- I
- B. I. T. 1937 [Známka 326] [Stamp 326]
- B. I. T. 1937 [Známka 327] [Stamp 327]
- B. I. T. 1937 [Známka 328] [Stamp 328]
- V. I. Lenin January 21, 1924 1949 [Známka 498] [Stamp 498]
- V. I. Lenin January 21, 1924 1949 [Známka 499] [Stamp 499]
- V. I. Lenin Canal [Známka 756] [Stamp 756]
- V. I. Lenin Museum, Prague [Známka 769] [Stamp 769]
- V. I. Lenin [Známka 963] [Stamp 963]
- V. I. Lenin 1870-1960 [Známka 1109] [Stamp 1109]
- V. I. Lenin Museum [Známka 1183] [Stamp 1183]
- I, Landscape Portrait 1890 [Známka 1624] [Stamp 1624]
- Petr Parler - Bretislav I, 14th Century [Známka 1679] [Stamp 1679]
- K. I. Dienzenhofer 1689-1751 [Známka 1690] [Stamp 1690]
- F. I. P. Day [Přepážkovy list 1695] [Minisheet 1695]
- V. I. Lenin 1879-1970 [Známka 1827] [Stamp 1827]
- V. I. Lenin 1879-1970 [Známka 1828] [Stamp 1828]
- Virgil I. Grissom [Známka 2023] [Stamp 2023]
- Viktor I. Pacajev [Známka 2024 2. vydání] [Stamp 2024 2nd Issue]
- Lucas Richter: Ferdinand I (1563) [Známka 2301] [Stamp 2301]
- V. I. Lenin 1870-1980 [Známka 2436] [Stamp 2436]
- Tomb of Prince Vratislav I, 10th - 15th Century [Známka 2550] [Stamp 2550]
- V. I. Lenin 1879-1985 [Známka 2688] [Stamp 2688]
- V. I. Lenin Museum, Prague [Známka 2725] [Stamp 2725]
- V. I. Lenin 1870-1924 [Známka 2924] [Stamp 2924]
- Holy Hunger I, 1966 [Známka 5] [Stamp 5]
- K. I. Dientzenhofer - Prague Loretta Tower - Facade [Známka 120] [Stamp 120]
- Premysl Otakar I., 1198-1230 [Známka 476] [Stamp 476]
- Vaclav I., 1230-1253 [Známka 477] [Stamp 477]
- Passenger Paddle Steamer Franz Joseph I [Známka 811] [Stamp 811]
- Victims of World War I 1914 [Známka 812] [Stamp 812]
- Victims of World War I 1914 [Známka 813] [Stamp 813]
- Naval Battle of Jutland, the Battle of Verdun, the Somme - Death of Emperor Joseph
F I - New Emperor Charles I [Aršik 906] [Souvenir Sheet 906]
- Charles I calls Parliment [Aršik 947] [Souvenir Sheet 947]
- A Berlin coach belonging to Emperor Ferdinand I of Austria, who used it after his abdication (2 December 1848) during his long stay
in Prague. [Přepážkovy list VZTL0071] [Minisheet VZTL0071]
- Coach belonging to Emperor Ferdinand I of Austria [Známka VZTL0073] [Stamp VZTL0073]
- II
- Premysl Otakar II. Detail of figures from tombs located in the cathedral [Známka 2313] [Stamp 2313]
- Premysl Funeral Crown, Otakar II, end of the 13th Century [Známka 2376] [Stamp 2376]
- Rudolf II. 1607 [Známka 2598] [Stamp 2598]
- Visit of Pope John Paul II [Známka 2938] [Stamp 2938]
- Seal of Premysl Otakar II (1262) [Známka 2944] [Stamp 2944]
- Magion II. 1989 [Známka 2976] [Stamp 2976]
- Czechoslovak Participation in WW II [Známka 3008] [Stamp 3008]
- Czechoslovak Participation in WW II [Známka 3009] [Stamp 3009]
- Czechoslovak Participation in WW II [Známka 3010] [Stamp 3010]
- Czechoslovak Participation in WW II [Známka 3011] [Stamp 3011]
- Premysl Otakar II., 1253-1278 [Známka 478] [Stamp 478]
- Vaclav II., 1283-1305 [Známka 479] [Stamp 479]
- Majestat of Rudolf II 1609-2009 [Známka 601] [Stamp 601]
- 800th Anniversary of the Golden Bull of Sicily Issued by King Frederick II [Známka 741] [Stamp 741]
- Emperor Wilhelm II, Nicholas II, Franz Ferdinand D'Este, Sultan Mehmed V, Emperor Franz Josef [Aršik 812] [Souvenir Sheet 812]
- Zoological Gardens II [Aršik 936] [Souvenir Sheet 936]
- Coach of Johan Adolf II, Prince of Schwarzenberg [Známka VZTL0071] [Stamp VZTL0071]
- Landau carriage of Johan Adolf II, Prince of Schwarzenberg from London's Barker & Co. who supplied carriages to British
Queen Victoria. [Přepážkovy list VZTL0071] [Minisheet VZTL0071]
- III
- Vaclav III., 1305-1306 [Známka 480] [Stamp 480]
- Rolls Royce Phantom III 1938 [Známka 738] [Stamp 738]
- IIIs
- IIIs [Přepážkovy list VZTL0071] [Minisheet VZTL0071]
- IIs
- IIs [Aršik 146] [Souvenir Sheet 146]
- ITALIA
- ITALIA '90 [Známka 2941] [Stamp 2941]
- ITU
- ITU International Telecomunication Union 1865-1965 [Známka 1465] [Stamp 1465]
- ITU [Známka 2544] [Stamp 2544]
- IV
- K. IV [Aršik 1523] [Souvenir Sheet 1523]
- Golden Seal of Charles IV, 1351 [Známka 2030] [Stamp 2030]
- Fiery Years IV - Liberation of Prague (1975) [Známka 2178] [Stamp 2178]
- Charles IV. Detail from a votive plate by Jan Ocka [Známka 2314] [Stamp 2314]
- Charles IV 1316-1378 [Známka 106] [Stamp 106]
- Vaclav IV. 1361-1419 [Známka 107] [Stamp 107]
- Prague of Charles IV [Aršik 174] [Souvenir Sheet 174]
- Art of the Charles IV Period [Přepážkovy list 462] [Minisheet 462]
- Charles IV [Známka 885] [Stamp 885]
- Charles IV [Aršik 885] [Souvenir Sheet 885]
- IXE
- Supermarine Spitfire LF Mk. IXE [Známka 833] [Stamp 833]
- Ibex
- Alpine Ibex [Známka 1348] [Stamp 1348]
- Ice
- 50th Anniversary of Ice Hockey 1909-1959 [Známka 1033] [Stamp 1033]
- World Ice Hockey Championships 1959 [Známka 1035] [Stamp 1035]
- European and Wold Championships in Ice Hockey, Prague 1972 [Známka 1953] [Stamp 1953]
- European and Wold Championships in Ice Hockey, Prague 1972 [Známka 1954] [Stamp 1954]
- European and Wold Championships in Ice Hockey, Prague 1972 [Známka 1961] [Stamp 1961]
- European and Wold Championships in Ice Hockey, Prague 1972 [Známka 1962] [Stamp 1962]
- World and European Ice Hockey Championships 1978 [Známka 2305] [Stamp 2305]
- World and European Ice Hockey Championships 1978 [Známka 2306] [Stamp 2306]
- World and European Chamipionships in Ice Hockey [Známka 2693] [Stamp 2693]
- World and European Chamipionships in Ice Hockey [Známka 2693] [Stamp 2693]
- World Ice Hockey Championships Prague and Bratislava 1992 [Známka 3003] [Stamp 3003]
- Czech Republic Ice Hockey Championship [Kupon 177] [Coupon 177]
- Czech Republic Ice Hockey Championship [Aršik 177] [Souvenir Sheet 177]
- World Ice Hockey Championships 2004 [Známka 393] [Stamp 393]
- 100 Years of Czech Ice Hockey 1908-2008 [Známka 559] [Stamp 559]
- Ice Hockey World Championships [Známka 641] [Stamp 641]
- 2015 Men's World Ice Hockey Championships [Známka 845] [Stamp 845]
- Icon
- Detail of an Icon from the end of the 17th Century, Bardejov [Známka 1819] [Stamp 1819]
- Detail from a 16th Century Icon of St. Michael the Archangel [Známka 1864] [Stamp 1864]
- Idka
- Zlata Idka [Známka 2426] [Stamp 2426]
- Ignac
- Ignac Josef Pesina 1766-1808 [Známka 1507] [Stamp 1507]
- Ignac Bizmayer 1992 [Známka 2353] [Stamp 2353]
- Igo
- Igo Etrich Dove 1909 [Známka L87] [Stamp L87]
- Ilja
- Ilja Jefimovic Repin 1844-1930 [Známka 2407] [Stamp 2407]
- Iljic
- Vladimir Iljic Lenin 1870-1970 [Známka 1810] [Stamp 1810]
- Illiteracy
- International Year of the Fight Against Illiteracy [Známka 2921] [Stamp 2921]
- Illuminated
- Bohemian Illuminated Manuscript - 11th Century [Známka 1613] [Stamp 1613]
- Royal Legate. Illuminated manuscript before the Year 1400 [Známka 2031] [Stamp 2031]
- Illustration
- Illustrations
- Slovak Fairytale Illustrations by Ludovit Fulla [Známka 1734] [Stamp 1734]
- Slovak Fairytale Illustrations by Ludovit Fulla [Známka 1735] [Stamp 1735]
- Slovak Fairytale Illustrations by Ludovit Fulla [Známka 1736] [Stamp 1736]
- Slovak Fairytale Illustrations by Ludovit Fulla [Známka 1737] [Stamp 1737]
- Slovak Fairytale Illustrations by Ludovit Fulla [Známka 1738] [Stamp 1738]
- Slovak Fairytale Illustrations by Ludovit Fulla [Známka 1739] [Stamp 1739]
- Biennial of Illustrations Bratislava [Kupon 2149] [Coupon 2149]
- Biennial of Illustrations Bratislava [Kupon 2150] [Coupon 2150]
- Biennial of Illustrations Bratislava [Kupon 2151] [Coupon 2151]
- Biennial of Illustrations Bratislava [Kupon 2152] [Coupon 2152]
- Biennial of Illustrations Bratislava [Kupon 2153] [Coupon 2153]
- Biennial of Illustrations Bratislava [Aršik 2600] [Souvenir Sheet 2600]
- 10th Biennial of Illustrations, Bratislava [Známka 2709] [Stamp 2709]
- 10th Biennial of Illustrations, Bratislava [Aršik 2709] [Souvenir Sheet 2709]
- 10th Biennial of Illustrations, Bratislava [Známka 2710] [Stamp 2710]
- 10th Biennial of Illustrations, Bratislava [Známka 2711] [Stamp 2711]
- 10th Biennial of Illustrations, Bratislava [Známka 2712] [Stamp 2712]
- 11th Biennial of Illustrations Bratislava [Známka 2804] [Stamp 2804]
- 11th Biennial of Illustrations Bratislava [Známka 2805] [Stamp 2805]
- 11th Biennial of Illustrations Bratislava [Známka 2806] [Stamp 2806]
- Biennial of Illustrations Bratislava [Aršik 2806] [Souvenir Sheet 2806]
- 11th Biennial of Illustrations Bratislava [Známka 2807] [Stamp 2807]
- 12th Biennial of Illustrations Bratislava [Známka 2904] [Stamp 2904]
- 12th Biennial of Illustrations Bratislava [Známka 2905] [Stamp 2905]
- 12th Biennial of Illustrations Bratislava [Známka 2906] [Stamp 2906]
- 12th Biennial of Illustrations Bratislava [Známka 2907] [Stamp 2907]
- Biennial of Illustrations Bratislava [Aršik 2907] [Souvenir Sheet 2907]
- Illustrator
- 100 Years since the Birth of Czechoslovak Illustrator and Engraver L. Jerka [Kupon 795] [Coupon 795]
- Illustrators
- 13th Biennial Exhibition of Children's Book Illustrators, Bratislava [Známka 2985] [Stamp 2985]
- 13th Biennial Exhibition of Children's Book Illustrators, Bratislava [Známka 2986] [Stamp 2986]
- Ilona
- Portrait of Ilona Kubinyiova c. 1864-1867 [Známka 2058] [Stamp 2058]
- Images
- First Images of Mars (1965) [Známka 1559] [Stamp 1559]
- Immortal
- The Immortal Lu Tung-Pin [Známka 591] [Stamp 591]
- Imperforate
- [Always Imperforate] [Známka 2865 2. vydání] [Stamp 2865 2nd Issue]
- Improves
- United Healthcare Improves the Next Generation [Známka 671] [Stamp 671]
- The Socialist Struggle and Soviet Methods of Working Improves Rail Transport [Známka 766] [Stamp 766]
- Imro
- Imro Weiner-Kral 1901 [Známka 1922] [Stamp 1922]
- Imro Weiner-Kral 1901 [Známka 2218] [Stamp 2218]
- Imro Weiner-Kral 1901 [Známka 2312] [Stamp 2312]
- In
- Commemorative Miniature Sheet In Support of the Families of Fallen Rebels [Aršik 408] [Souvenir Sheet 408]
- In Honor of Frederick Vaclavek, Champion of Socialist Literature [Známka 712] [Stamp 712]
- In Memory of May 1st 1890 [Známka 723] [Stamp 723]
- In Witness of Friendship with the Korean People [Známka 753] [Stamp 753]
- In Memory of the Voiceless Victims [Známka 2946] [Stamp 2946]
- India
- USSR - India [Známka 2162] [Stamp 2162]
- Indian
- Indian, 19th Century [Známka 504] [Stamp 504]
- Indican
- Indican and African Elephants [Známka 1250] [Stamp 1250]
- Indonesia
- Bali, Indonesia, 1920 s [Známka 592] [Stamp 592]
- Indoor
- World Championships in Indoor Cycling [Známka 1412] [Stamp 1412]
- Industrial
- Industrial Production has Tripled 1948-1958 [Známka 982] [Stamp 982]
- Industry
- Five Year Plan for a Heavy Industry Base [Známka 575] [Stamp 575]
- Five Year Plan for a Heavy Industry Base [Známka 576] [Stamp 576]
- Five Year Plan for a Heavy Industry Base [Známka 577] [Stamp 577]
- 1960 100% Chemical Industry to 186% 1965 [Známka 1131] [Stamp 1131]
- Nationalization of Industry [Známka 1185] [Stamp 1185]
- Slovnaft - Development of a Chemical Industry Base [Známka 2167] [Stamp 2167]
- 75th Year for the Czech Ministry of Industry and Trade Building [Známka 594] [Stamp 594]
- Infant
- Infant of Prague [Známka 2988] [Stamp 2988]
- Simeon with the Infant Jesus (after 1725) [Známka 276] [Stamp 276]
- Information
- World Summit on Information Technology [Známka 450] [Stamp 450]
- Ingraham
- Erick Ingraham (USA) [Známka 2712] [Stamp 2712]
- Initial
- Initial Voyage of the Steamer Bohemia [Známka 2970] [Stamp 2970]
- Innsbruck
- 9th Winter Olympic Games Innsbruck 1964 [Známka 1353] [Stamp 1353]
- 9th Winter Olympic Games Innsbruck 1964 [Známka 1354] [Stamp 1354]
- 9th Winter Olympic Games Innsbruck 1964 [Známka 1355] [Stamp 1355]
- 12th Winter Olympic Games, Innsbruck 1976 [Známka 2187] [Stamp 2187]
- 12th Winter Olympic Games, Innsbruck 1976 [Známka 2188] [Stamp 2188]
- 12th Winter Olympic Games, Innsbruck 1976 [Známka 2189] [Stamp 2189]
- Institute
- Academy of Sciences Astronomical Institute Telescope, Ondrejov [Známka 972] [Stamp 972]
- Slovak Academy of Sciences Archaelogical Institute [Známka 2548] [Stamp 2548]
- 60th Anniversary of the Joint Institute for Nuclear Research, Dubna [Známka 880] [Stamp 880]
- Insurrection
- New ROH Slovak Insurrection Convalescent Home, Low Tatras [Známka 1364] [Stamp 1364]
- 20th Anniversary of the Slovak Insurrection [Známka 1389] [Stamp 1389]
- 20th Anniversary of the Slovak Insurrection [Známka 1390] [Stamp 1390]
- Interkosmos
- Internation
- Internation Firefighters' Competition, Ostrava, 2009 [Známka 602] [Stamp 602]
- International
- International Olympic Congress Prague 1925 [Známka 180] [Stamp 180]
- International Olympic Congress Prague 1925 [Známka 181] [Stamp 181]
- International Olympic Congress Prague 1925 [Známka 182] [Stamp 182]
- 2nd International Student Congress [Známka 550] [Stamp 550]
- 2nd International Student Congress [Známka 551] [Stamp 551]
- 2nd International Student Congress [Známka 552] [Stamp 552]
- 2nd International Student Congress [Známka 553] [Stamp 553]
- Students International Solidarity [Známka 553] [Stamp 553]
- 1st Anniversary of the Establishment of the International Association of Postal, Telephone, Telegraph, and Radio Employees [Známka 565] [Stamp 565]
- 1st Anniversary of the Establishment of the International Association of Postal, Telephone, Telegraph, and Radio Employees [Známka 566] [Stamp 566]
- Honorary Laureate for the International Peace Prize [Známka 573] [Stamp 573]
- Honorary Laureate for the International Peace Prize [Známka 574] [Stamp 574]
- International Women's Day March 8, 1951 [Známka 578] [Stamp 578]
- International Women's Day March 8, 1951 [Známka 579] [Stamp 579]
- International Women's Day March 8, 1951 [Známka 580] [Stamp 580]
- International Women's Day 1952 [Známka 636] [Stamp 636]
- International Day of Solidarity to Free Political Prisoners April 11, 1952 [Známka 644] [Stamp 644]
- International Day of Solidarity to Free Political Prisoners April 11, 1952 [Známka 645] [Stamp 645]
- International Conference on the defence of Children April 12 to 16, 1952 [Známka 646] [Stamp 646]
- International Conference on the defence of Children April 12 to 16, 1952 [Známka 647] [Stamp 647]
- Athletes for Stronger International Friendships [Známka 675] [Stamp 675]
- International Women's Day March 8, 1953 [Známka 714] [Stamp 714]
- International Women's Day March 8, 1953 [Známka 715] [Stamp 715]
- 6th International PBW Bicycle Race for Peace [Známka 722] [Stamp 722]
- 30th International Six-Day Motorcycle Race, September 13-18, 1955, Gottwaldov [Známka 852] [Stamp 852]
- International Stamp Exhibition [Aršik 853 1. vydání] [Souvenir Sheet 853 1st Issue]
- International Stamp Exhibition [Aršik 853 2. vydání] [Souvenir Sheet 853 2nd Issue]
- 9th International Peace Race [Známka 884] [Stamp 884]
- International Peace marathon, Kosice 1956 [Známka 901] [Stamp 901]
- 10th International Peace Race 1957 [Známka 932] [Stamp 932]
- 10th International Peace Race 1957 [Známka 933] [Stamp 933]
- 32nd International Six-Day Motorcycle Competition [Známka 937] [Stamp 937]
- International Geophysical Year 1957-1958 [Známka 972] [Stamp 972]
- International Geophysical Year 1957-1958 [Známka 973] [Stamp 973]
- International Geophysical Year 1957-1958 [Známka 974] [Stamp 974]
- 4th Congress of the International Democratic Federation of Women 1958 [Známka 998] [Stamp 998]
- International Fair Brno 6 to 20 September 1959 [Známka 1063] [Stamp 1063]
- International Fair Brno 6 to 20 September 1959 [Známka 1064] [Stamp 1064]
- International Fair Brno 6 to 20 September 1959 [Známka 1065] [Stamp 1065]
- Apimondia - 19th International Beekeepers Congress, Prague 1963 [Známka 1320] [Stamp 1320]
- Brno International Fair 1963 [Známka 1322] [Stamp 1322]
- Brno International Fair 1963 [Známka 1323] [Stamp 1323]
- International Foundry Congress Prague 1963 [Známka 1328] [Stamp 1328]
- 14th International Film Festival Karlov Vary 1964 [Známka 1386] [Stamp 1386]
- International Canine Congress Prague 1965 [Známka 1448] [Stamp 1448]
- International Canine Congress Prague 1965 [Známka 1451] [Stamp 1451]
- International Cooperation Year 1965 [Známka 1456] [Stamp 1456]
- International Democratic Women's Federation 1945-1965 [Známka 1458] [Stamp 1458]
- ITU International Telecomunication Union 1865-1965 [Známka 1465] [Stamp 1465]
- International Macromolecular Symposium Prague 1965 [Známka 1471] [Stamp 1471]
- 30th Anniversary of the International Spanish Brigade [Známka 1543] [Stamp 1543]
- 8th International Trade Fair, Brno 1966 [Známka 1548] [Stamp 1548]
- 9th Congress of the International Union of Architects [Známka 1622] [Stamp 1622]
- Sixth International Philatelic Exhibition Washington, D. C. [Známka L60] [Stamp L60]
- International Year of Human Rights 1968 [Známka 1663] [Stamp 1663]
- 6th International Slavic Congress, Prague 1968 [Známka 1698] [Stamp 1698]
- 23rd International Geological Congress [Známka 1699] [Stamp 1699]
- 23rd International Geological Congress [Známka 1700] [Stamp 1700]
- 23rd International Geological Congress [Známka 1701] [Stamp 1701]
- 23rd International Geological Congress [Známka 1702] [Stamp 1702]
- 23rd International Geological Congress [Známka 1703] [Stamp 1703]
- International Workers Organization 1919-1969 [Známka 1743] [Stamp 1743]
- The International, Words by E. Pottier, Music by Pierre Degeyter [Známka 1884] [Stamp 1884]
- The International, Words by E. Pottier, Music by Pierre Degeyter [Kupon 1884] [Coupon 1884]
- UNESCO International Year of the Book 1972 [Známka 1946] [Stamp 1946]
- International Hydrological Decade [Známka 2077] [Stamp 2077]
- International Hydrological Decade [Známka 2078] [Stamp 2078]
- International Hydrological Decade [Známka 2079] [Stamp 2079]
- International Hydrological Decade [Známka 2080] [Stamp 2080]
- International Hydrological Decade [Známka 2081] [Stamp 2081]
- International Children's Day 1949-1974 [Známka 2090] [Stamp 2090]
- International Woman's Year 1975 [Známka 2126] [Stamp 2126]
- Transit Gas Pipeline - Through International Cooperation [Známka 2170] [Stamp 2170]
- International Folklore Festival, Straznice 1946-1976 [Známka 2199] [Stamp 2199]
- 20th International Film Festival, Karlov Vary [Známka 2200] [Stamp 2200]
- Spaninish International Brigade 40th Anniversary [Známka 2218] [Stamp 2218]
- 20th International Engineering Fair in Brno [Známka 2336] [Stamp 2336]
- International Peace Marathon - Kosice 1924-1980 [Známka 2422] [Stamp 2422]
- International Space Flights [Aršik 2434 1. vydání] [Souvenir Sheet 2434 1st Issue]
- International Space Flights [Aršik 2434 2. vydání] [Souvenir Sheet 2434 2nd Issue]
- International Stamp Fair Essen '80 [Aršik 2460] [Souvenir Sheet 2460]
- International Year for Disabled Persons 1981 [Známka 2468] [Stamp 2468]
- International Flights into Space - Space Program [Známka 2482] [Stamp 2482]
- International Stamp Exhibition [Známka 2483 1. vydání] [Stamp 2483 1st Issue]
- International Stamp Exhibition [Známka 2484 1. vydání] [Stamp 2484 1st Issue]
- 45th Anniversary of the International Spanish Brigade [Známka 2496] [Stamp 2496]
- 25th International Youth Character Building [Známka 2501] [Stamp 2501]
- 60th Anniversary International Raiway Union [Známka 2530] [Stamp 2530]
- 10th International Exhibition of Children's Art Lidice (UNESCO) [Známka 2538 1. vydání] [Stamp 2538 1st Issue]
- 10th International Exhibition of Children's Art Lidice UNESCO [Aršik 2538 1. vydání] [Souvenir Sheet 2538 1st Issue]
- 10th International Exhibition of Children's Art Lidice (UNESCO) [Známka 2538 2. vydání] [Stamp 2538 2nd Issue]
- 10th International Exhibition of Children's Art Lidice UNESCO [Aršik 2538 2. vydání] [Souvenir Sheet 2538 2nd Issue]
- 90 Years of the International Olympic Committee [Známka 2633] [Stamp 2633]
- International Space Travel [Známka 2638] [Stamp 2638]
- International Space Travel [Kupon 2638] [Coupon 2638]
- International Space Travel [Známka 2639] [Stamp 2639]
- International Space Travel [Kupon 2639] [Coupon 2639]
- International Space Travel [Známka 2640] [Stamp 2640]
- International Space Travel [Kupon 2640] [Coupon 2640]
- International Space Travel [Známka 2641] [Stamp 2641]
- International Space Travel [Kupon 2641] [Coupon 2641]
- International Space Travel [Známka 2642] [Stamp 2642]
- International Space Travel [Kupon 2642] [Coupon 2642]
- 45th Anniversary of International Students Day [Známka 2677] [Stamp 2677]
- International Peace Year 1986 [Známka 2689] [Stamp 2689]
- International Peace Year 1986 [Aršik 2689] [Souvenir Sheet 2689]
- International Peace Year 1986 [Známka 2730] [Stamp 2730]
- 25th Anniversary of the Karlov Vary International Film Festival [Známka 2741] [Stamp 2741]
- International Music Festival [Známka 2742] [Stamp 2742]
- International Philatelic Federation [Známka 2747 1. vydání] [Stamp 2747 1st Issue]
- International Philatelic Federation [Známka 2747 2. vydání] [Stamp 2747 2nd Issue]
- International Philatelic Federation [Známka 2747 3. vydání] [Stamp 2747 3rd Issue]
- 50th Anniversary of the International Spanish Brigades [Známka 2763] [Stamp 2763]
- International Spanish Brigades 1936-1986 [Aršik 2763] [Souvenir Sheet 2763]
- International Year of the Fight Against Illiteracy [Známka 2921] [Stamp 2921]
- International Literacy Year [Kupon 2921] [Coupon 2921]
- International Year of the Family 1994 [Známka 31] [Stamp 31]
- 100th Anniversary of the International Olympic Committee [Známka 46] [Stamp 46]
- International Stamp Exhibition PRAGA 1998 [Aršik 156] [Souvenir Sheet 156]
- International Postage Stamp Exhibition [Aršik 171] [Souvenir Sheet 171]
- International Postage Stamp Exhibition [Přepážkovy list 191] [Minisheet 191]
- International Postage Stamp Exhibition [Přepážkovy list 192] [Minisheet 192]
- International Mathematics Year 2000 [Známka 260] [Stamp 260]
- Annual Meeting of the International Monetary Fund and World Bank, Prague 2000 [Známka 270] [Stamp 270]
- International Planet Earth Day [Známka 546] [Stamp 546]
- International Astronomy Year 2009 [Známka 596] [Stamp 596]
- 6th International Philatelic Exhibition Euregia Egrensis [Známka 844] [Stamp 844]
- International Folklore Festival, Straznice [Známka 890] [Stamp 890]
- Interplanetary
- Soviet Unmanned Interplanetary Station 10-4-1959 [Známka 1169] [Stamp 1169]
- Intersputnik
- Establishing an Organizatized System of Space Telecommunications -
Intersputnik [Známka 1920] [Stamp 1920]
- Intersputnik [Známka 2544] [Stamp 2544]
- Invention
- Bicentenary of the Invention of the Lightening Rod June 15, 1754 [Známka 794] [Stamp 794]
- Bicentenary of the Invention of the Lightening Rod June 15, 1754 [Známka 795] [Stamp 795]
- 60th Anniversary of the Invention of Radio [Známka 833] [Stamp 833]
- Inventor
- Inventor of Photogravure [Známka 952] [Stamp 952]
- Inventor of the Screw Propeller [Známka 953] [Stamp 953]
- Czech Inventor of Contact Lens [Známka 790] [Stamp 790]
- Iris
- Yellow Iris [Známka 1380] [Stamp 1380]
- Iris [Známka 2039] [Stamp 2039]
- Dwarf Iris [Známka 137] [Stamp 137]
- Tall Bearded Iris [Známka 646] [Stamp 646]
- Iris [Známka 650] [Stamp 650]
- Irish
- Irish Setter [Známka 2042] [Stamp 2042]
- Irish Wolfhound [Známka 2948] [Stamp 2948]
- Iron
- Ostrava - Iron Foundation of Socialism [Známka 612] [Stamp 612]
- Ostrava - Iron Foundation of Socialism [Známka 614] [Stamp 614]
- 4.2 Million Tons of Pig Iron in 1960 to 7.6 Tons of Pig Iron in 1965 [Známka 1129] [Stamp 1129]
- Iron Mountain Protected Area [Známka 905] [Stamp 905]
- Ironwork
- St. Vitus Cathedral, Adam and Eve - Ironwork [Známka 1960] [Stamp 1960]
- Is
- Is [Přepážkovy list VZTL0071] [Minisheet VZTL0071]
- Isotta
- Isotta Fraschini Tipo 8A 1929 [Známka 740] [Stamp 740]
- Later, they produced bodies for Alfa Romao, Fiat and Isotta Fraschini. [Přepážkovy list VZTL0071] [Minisheet VZTL0071]
- Issue
- Joint Czech Republic and French Issue [Kupon 434] [Coupon 434]
- Joint Czech-Austrian Issue [Aršik 574] [Souvenir Sheet 574]
- Joint Czech-Slovak Issue [Aršik 575] [Souvenir Sheet 575]
- Joint Czech-Luxembourg Issue [Kupon 636] [Coupon 636]
- Issued
- Commemorative Medal Issued on May 1st 1890 [Známka 723] [Stamp 723]
- 50,000 Pieces Issued at HUP Prague [Známkové sešitky 14] [Booklet 14]
- 800th Anniversary of the Golden Bull of Sicily Issued by King Frederick II [Známka 741] [Stamp 741]
- Istanbul
- Istand
- Flying from an Istand of the Future [Známka 2280] [Stamp 2280]
- Italy
- Czechoslovak Legion in Italy 1918-1938 [Kupon 338] [Coupon 338]
- Pistol with Wheel Lock, Italy and the Netherlands, around 1600 [Známka 1745] [Stamp 1745]
- Central Powers: Austria-Hungary, Germany, Ottoman Empire, Italy [Aršik 812] [Souvenir Sheet 812]
- Itar
- Itar Janatka - Praha 1921 [Známka 2157] [Stamp 2157]
- Ivan
- Ivan Olbracht 1882-1952 [Známka 917] [Stamp 917]
- Ivan Krasko 1876-1958 [Známka 2185] [Stamp 2185]
- Ivan Stepanovic Konev [Známka 2593] [Stamp 2593]
- Ivan Strnad 1926-2005 [Známka 754] [Stamp 754]
- Ivanovic
- Andrej Ivanovic Jeremenko [Známka 2594] [Stamp 2594]