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International Meteorological Centenary
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International Meteorological Centenary
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Below is a checklist of International Meteorological Centenary (100th anniv. IMO-WMO: 1873 — 1973) postal items (stamps, souvenir sheets, aerogrammes, postal cards, etc.). Catalog numbers, years of issue, and notes on the items featured are given when available. If readers know of additional information or images, please contact the authors using the e-mail addresses at the bottom of this page.
| Launch covers (including anniversary-of-launch covers, and launch-related event covers) (farther below) |
Other postal items (stamps, souvenir sheets, aerogrammes, postal cards, etc.) (immediately below) |
|---|---|
| IMO/WMO Centenary (1873 — 1973) | IMO/WMO Centenary (1873 — 1973) |
Below is a list of IMO/WMO Centenary on postal items (stamps, souvenir sheets, aerogrammes, postal cards, etc.).
| Country | Catalog Number | Type of Item | Year of Issue | Notes on Content |
|---|---|---|---|---|
| IMO/WMO Centenary (1873 — 1973) | ||||
| Afghanistan | 879 (Mi1134) | 1973 | ||
| Afghanistan | 880 (Mi1135) | |||
| Angola | 571 (Mi584) | CD61 | 1973 | |
| Angola | 571 fdc | Stamp and (orange-brown and brown printed) cachet on FDC | ||
| Argentina | 1017 (Mi1170) | 1974 | ||
| Argentina | 1017 fdc1 | Stamp and cachet on FDC | ||
| Argentina | 1017 fdc2 | Stamp and (multi-color printed) cachet on FDC | ||
| Argentina | 1017 fdc3 | Stamp and cachet (different) on FDC | ||
| Argentina | 1017 card1 | FDC card | ||
| Argentina | 1017 card2 | FDC card (different) | ||
| Argentina | 1017 card3 | FDC card (different) | ||
| Argentina | 1017 card4 | FDC card (different) | ||
| Argentina | 1017 folder | FDC folder | ||
| Argentina | 1017 cover (Mi1170 cover) | Stamp on cover | 1976 | |
| Argentina | 1017 cover1 (Mi1170 cover1) | Stamp on cover | 1977 | |
| Argentina | 1017 cover2 (Mi1170 cover2) | Stamp on cover (different) | 1977 | Also APT antenna |
| Argentina | 1017 cover3 (Mi1170 cover3) | Stamp on cover (different) | 1977 | |
| Argentina | 1017 cover4 (Mi1170 cover4) | Stamp on cover (different) | 1977 | |
| Argentina | 1017 cover (Mi1170 cover) | Stamp on cover | 197? | |
| Austria | 950 (Mi1423) | 1973 | ||
| Austria | 950 fdc1 | Stamp and (?) cachet on FDC | ||
| Austria | 950 fdc2 | Stamp and (pictorial) cancel and (?) cachet (including design like stamp) on FDC | ||
| Austria | 950 fdc3 | Stamp and (pictorial) cancel and (?) cachet on FDC | ||
| Austria | 950 fdc4 | Stamp and (pictorial) cancel and (?) cachet (including design like stamp) on FDC | ||
| Austria | 950 fdc5 | Stamp and (pictorial) cancel and (?) cachet (including design like stamp) on FDC | ||
| Austria | 950 fdc6 | Stamp and (pictorial) cancel and (?) cachet on FDC | ||
| Austria | 950 fdc7 | Stamp and (pictorial) cancel and (?) cachet on FDC | ||
| Austria | 950 fdc8 | Stamp and (pictorial) cancel and (?) cachet (including design like stamp) on FDC | ||
| Austria | 950 black | Blackprint | ||
| Austria | 950 black sc | Blackprint souvenir card | ||
| Bahamas | 346 (Mi354) | 1973 | ||
| Bahamas | 347 (Mi355) | |||
| Belgium | 836 (Mi1714) i836 | Imperforate | 1973 | Also APT antenna |
| Belgium | 836 fdc1 | Stamp and (?) cachet on FDC | ||
| Belgium | 836 fdc2 | Stamp and (?) cachet on FDC | ||
| Belgium | 836 fdc3 | Stamp and (?) cachet on FDC | ||
| Belgium | 836 fdc4 | Stamp and (SonyStamp) cachet on FDC | ||
| Belgium | 836 fdc5 | Stamp and (?) cachet on FDC (Brussels cancel) | ||
| Belgium | 836 fdc6 | Stamp and (?) cachet (same) on FDC (Sint-Katelijne-Waver cancel) | ||
| Belgium | 836 fdc7 | Stamp on FDC (PhilaGent cachet) | ||
| Belgium | 836 card | FDC card (SonyStamp) | ||
| Belgium | 836 sc1 | Souvenir card | ||
| Belgium | 836 sc2 | Souvenir card (different) | ||
| Belgium | 836 sc3 | Souvenir card (different) | ||
| Belgium | 836 sc4 | Souvenir card (different) | ||
| Belgium | 836 maxi | Maxicard | ||
| Belgium | 836 card | Stamp on card | 1980 | Also APT antenna |
| Benin | C382 (Mi_O473) | Dahomey C188 overprinted | 1988 | |
| Benin | C624 (Mi1568) | Dahomey C188 surcharged | 2009 | |
| Botswana | 96 (Mi96) | 1973 | ||
| Botswana | 97 (Mi97) | |||
| Botswana | 98 (Mi98) | |||
| Botswana | 99 (Mi99) | |||
| Botswana | 96-99 fdc1 | Four stamps and cachet on FDC (Lobatse cancel) | ||
| Botswana | 96-99 fdc2 | Four stamps and cachet (same) on FDC (Serowe cancel) | ||
| Cameroun | 572 (Mi745) i572 | Imperforate | 1973 | Also 13th WMD |
| Cameroun | 572 ds | Deluxe sheet (572) | ||
| Cameroun | 572 proof | Signed proof | ||
| Cameroun | 572 fdc | Stamp and (Éditions J.F.) cachet on FDC | ||
| Cape Verde | 363 (Mi367) | CD61 | 1973 | |
| Cape Verde | 363 fdc | Stamp on FDC | ||
| Cape Verde | 387 (Mi392) | 363 overprinted, CD61 | 1978 | |
| Central African Republic | C115 (Mi326A) iC115 (Mi326B) | Imperforate | 1973 | |
| Central African Republic | C115 proof1 | Signed proof (blue) | ||
| Central African Republic | C115 proof2 | Signed proof (black) | ||
| Central African Republic | C115 proof3 | Signed proof (red) | ||
| Central African Republic | C115 proofs | Color proof strip | ||
| Central African Republic | C115 fdc1 | Stamp and (text) cancel on FDC | ||
| Central African Republic | C115 fdc2 | Stamp and (purple and black printed) cachet on FDC | ||
| Chile | B5 (Mi795) | 402 overprinted for 100th anniv. IMO-WMO | 1974 | |
| Congo (People's Republic) | C161 (Mi378) | 1973 | ||
| Congo (People's Republic) | C161 proof1 | Trial color proof pair | ||
| Congo (People's Republic) | C161 proof2 | Trial color proof pair (different) | ||
| Congo (People's Republic) | C161 proof3 | Signed proof | ||
| Congo (People's Republic) | C161 fdc | Stamp and cachet on FDC | ||
| Cuba | 1823 (Mi1898) | 1973 | ||
| Cuba | 1824 (Mi1899) | |||
| Cuba | 1825 (Mi1900) | |||
| Cuba | 1826 (Mi1901) | |||
| Cuba | 1823-1824 fdc | Two stamps on FDC | ||
| Cuba | 1825-1826 fdc | Two stamps on FDC | ||
| Dahomey | C188 (Mi534) iC188 | Imperforate | 1973 | |
| Dahomey | C188 ds | Deluxe sheet (C188) | ||
| Dahomey | C188 proof1 | Signed proof (red) | ||
| Dahomey | C188 proof2 | Signed proof (blue) | ||
| Dahomey | C188 proof3 | Signed proof (black) | ||
| Dahomey | C188 proofs1 | Color proof strip | ||
| Dahomey | C188 proofs2 | Color proof strip (different) | ||
| Dahomey | C188 proof pair1 | Color proof pair | ||
| Dahomey | C188 proof pair2 | Color proof pair (different) | ||
| Dahomey | C188 proof pair3 | Color proof pair (different) | ||
| Dahomey | C188 fdc | Stamp and (pictorial) cancel and (green and black printed) cachet on FDC | ||
| Dahomey | C188 cover (Mi534 cover) | Stamp and (green and black printed) cachet on cover | 1974 | |
| Dahomey | C199 (Mi552) | C188 overprinted | 1974 | |
| Dahomey | C199 double | C188 double overprint | ||
| Dahomey | C199 inverted | C188 inverted overprint | ||
| Dominica | 354 (Mi354) | 1973 | ||
| Dominica | 355 (Mi355) | |||
| Dominica | 356 (Mi356) | |||
| Dominica | 357 (Mi357) | |||
| Dominica | 358 (Mi358) | |||
| Dominica | 359 (Mi359) | |||
| Dominica | 360 (Mi360) | |||
| Dominica | 354-360 fdc | Seven stamps and cachet on FDC | ||
| Dominica | 354-360 proofs1 | Proof sheet | ||
| Dominica | 354-360 proofs2 | Proof sheet (different) | ||
| Dominica | 360a (BL17) | MS2 (359-360) | ||
| Dominica | 360a fdc | MS2 and cachet on FDC | ||
| Dominican Republic | 711 (Mi1040) | 1973 | ||
| Dominican Republic | C208 (Mi1041) | |||
| Dominican Republic | 711+C208 fdc | Two stamps and cachet on FDC | ||
| Egypt | C157 (Mi11140) | 1973 | ||
| Egypt | 944+B44+C157-C158 fdc | One of four stamps on FDC | ||
| Ethiopia | 661 (Mi747) | 1973 | ||
| Ethiopia | 662 (Mi748) | |||
| Ethiopia | 663 (Mi749) | |||
| Ethiopia | 661-663 proofs1 | Proofs (color-shifted) | ||
| Ethiopia | 661-663 proofs2 | Proofs (color-shifted, different) | ||
| Ethiopia | 661-663 proofs3 | Proofs (partial-color) | ||
| Ethiopia | 661-663 fdc1 | Three stamps and cachet on FDC (Amhara cancel) | ||
| Ethiopia | 661-663 fdc2 | Three stamps and cachet (same) on FDC (Addis Ababa cancel) | ||
| Ethiopia | 661-663 fdc3 | Three stamps on FDC (same, except red cancel and red cachet printing) | ||
| Finland | 531 (Mi728) | 1973 | ||
| Finland | 531 fdc1 | Stamp and (pictorial) cancel and (blue printed) cachet on FDC | ||
| Finland | 531 fdc2 | Stamp and (pictorial) cancel and (purple printed) cachet on FDC | ||
| Germany (East) | 1362 (BL34) | SS1 | 1972 | International Meteorological Centenary Meeting, Leipzig |
| Germany (East) | 1362 fdc | SS1 on FDC | ||
| Germany (East) | 1363 (BL35) | SS1 | ||
| Germany (East) | 1363 fdc1 | SS1 on FDC (pictorial cancel) | ||
| Germany (East) | 1363 fdc2 | SS1 on FDC (text cancel) | ||
| Germany (East) | 1364 (BL36) | SS1 | ||
| Germany (East) | 1364 fdc1 | SS1 on FDC (pictorial cancel) | ||
| Germany (East) | 1364 fdc2 | SS1 on FDC (text cancel) | ||
| Germany (East) | 1362 cover (BL34 cover) | SS1 on cover (not FDC date) | 1972 | International Meteorological Centenary Meeting, Leipzig |
| Germany (West) | 1102 (Mi760) | 1973 | ||
| Germany (West) | 1102 fdc1 | Stamp and (Bonn) cancel and (FIDACOS, with "150"th anniv. error) cachet on FDC | ||
| Germany (West) | 1102 fdc2 | Stamp and (Offenbach am Main) cancel and (FIDACOS, with "150"th anniv. error) cachet on FDC | ||
| Germany (West) | 1102 fdc3 | Stamp and (Offenbach am Main) cancel and (?) cachet on FDC | ||
| Germany (West) | 1102 fdc4 | Two stamps and (Bonn) cancel and (Keller) cachet on FDC | ||
| Germany (West) | 1102 fdc5 | Stamp and (Bonn) cancel and (?) cachet on FDC | ||
| Germany (West) | 1102 fdc6 | Stamp and (Bonn) cancel and (?) cachet on FDC | ||
| Germany (West) | 1102 fdc7 | Stamp and (Offenbach am Main) cancel and (?) cachet on FDC | ||
| Germany (West) | 1102 fdc8 | Stamp and (?) cachet on FDC (Berlin cancel) | ||
| Germany (West) | 1102 fdc9 | Stamp and (Bonn) cancel and (Folio-print) cachet on FDC | ||
| Germany (West) | 1102 fdc10 | Stamp and (Offenbach am Main) cancel and (Folio-print) cachet on FDC | ||
| Germany (West) | 1102 fdc11 | Stamp and (Offenbach am Main) cancel on FDC (black printed cachet) | ||
| Germany (West) | 1102 sc | Souvenir card | ||
| Ghana | 503 (Mi520A) i503 (Mi520B) | Imperforate | 1973 | |
| Ghana | 504 (Mi521A) i504 (Mi521B) | Imperforate | ||
| Ghana | 505 (Mi522A) i505 (Mi522B) | Imperforate | ||
| Ghana | 506 (Mi523A) i506 (Mi523B) | Imperforate | ||
| Ghana | i503-i506 fdc | Four imperforate stamps and (ArtCraft) cachet on FDC | ||
| Ghana | 507 (BL51A) i507 (BL51B) | MS2 (507 (a-b)) (Mi524-525) Imperforate MS2 (i507 (a-b)) | ||
| Ghana | i507 fdc | Imperforate MS2 on FDC | ||
| Gilbert and Ellice Islands | 218 (Mi213) | 1973 | ||
| Gilbert and Ellice Islands | 219 (Mi214) | |||
| Gilbert and Ellice Islands | 220 (Mi215) | |||
| Gilbert and Ellice Islands | 221 (Mi216) | |||
| Gilbert and Ellice Islands | 218-221 fdc | Four stamps and (black and cyan printed) cachet on FDC | ||
| Grenada | 490 (Mi516) | 1973 | ||
| Grenada | 491 (Mi517) | |||
| Grenada | 492 (Mi518) | |||
| Grenada | 493 (Mi519) | |||
| Grenada | 494 (Mi520) | |||
| Grenada | 495 (Mi521) | |||
| Grenada | 496 (Mi522) | |||
| Grenada | 497 (Mi523) | |||
| Grenada | 498 (BL28) | SS1 | ||
| Grenada | 494+496 fdc | Two stamps and (ArtCraft) cachet on FDC | ||
| Guinea-Bissau | 349 (Mi349) | Portuguese Guinea 344 overprinted in black, CD61 | 1975 | |
| Guinea-Bissau | 349a | Portuguese Guinea 344 overprinted in brown, CD61 | ||
| Guinea-Bissau | 703 (Mi926) | 349 overprinted, CD61 | 1987 | |
| Iceland | 460 (Mi484) | 1973 | ||
| Iceland | 460 fdc1 | Stamp and (FM no.148) cachet on FDC | ||
| Iceland | 460 fdc2 | Stamp and (green printed) cachet on FDC | ||
| Iceland | 460 fdc3 | Stamp on FDC (F.F. no.71 grey cachet) | ||
| Iceland | 460 fdc4 | Stamp on FDC (F.F. no.71 yellow-orange cachet) | ||
| Iceland | 460 fdc5 | Stamp on FDC (multi-color printed cachet) | ||
| Iceland | 460 fdc6 | Stamp on FDC (N cachet) | ||
| Indonesia | 840 (Mi728) | 1973 | ||
| Indonesia | 840 fdc | Stamp and cachet on FDC | ||
| Iran | 1721 (Mi1644) | 1973 | ||
| Iraq | 703 (Mi777) | 1973 | ||
| Iraq | 704 (Mi778) | |||
| Ireland | 332 (Mi292) | 1973 | ||
| Ireland | 333 (Mi293) | |||
| Ireland | 332-333 fdc1 | Two stamps on FDC (brown and yellow-tan printed cachet) | ||
| Ireland | 332-333 fdc2 | Two stamps and (orange-brown and black printed) cachet on FDC | ||
| Ireland | 332-333 fdc3 | Two stamps and (Ireland Post) cachet on FDC, also insert | ||
| Ireland | 332-333 fdc4 | Two stamps and (blue printed) cachet on FDC, also back | ||
| Kenya, Uganda, and Tanzania | 259 (Mi247) | 1973 | ||
| Kenya, Uganda, and Tanzania | 260 (Mi248) | |||
| Kenya, Uganda, and Tanzania | 261 (Mi249) | |||
| Kenya, Uganda, and Tanzania | 262 (Mi250) | Also APT antenna | ||
| Kenya, Uganda, and Tanzania | 259-262 fdc1 | Four stamps and cachet on FDC (Dar-es-Salaam, Tanzania cancel) | (As above for stamps) | |
| Kenya, Uganda, and Tanzania | 259-262 fdc2 | Four stamps and cachet (same) on FDC (Kampala, Uganda cancel) | ||
| Kenya, Uganda, and Tanzania | 259-262 card | Presentation card | ||
| Korea (South) | 858 (Mi865) | 1973 | ||
| Korea (South) | 858 fdc | Stamp and (pictorial) cancel and (KPC) cachet on FDC | ||
| Korea (South) | 858a (BL360) | MS2 (2x 858) | ||
| Kuwait | 577 (Mi571) | 1973 | ||
| Kuwait | 577 proof | Proof with non-adopted colors | ||
| Kuwait | 578 (Mi572) | |||
| Kuwait | 578 proof | Proof with non-adopted colors | ||
| Kuwait | 579 (Mi573) | |||
| Kuwait | 579 proof1 | Proof with adopted colors | ||
| Kuwait | 579 proof2 | Proof (different) | ||
| Kuwait | 577-579 fdc1 | Three stamps on FDC | ||
| Kuwait | 577-579 fdc2 | Three stamps on FDC (different) | ||
| Laos | C108 (Mi368) iC108 | From imperforate MS4 (4x iC108) | 1973 | |
| Laos | C108 ds | Deluxe sheet (C108) | ||
| Laos | C108 ims | Imperforate MS4 | ||
| Laos | C109 (Mi369) iC109 | From imperforate MS4 (4x iC109) | ||
| Laos | C109 ds | Deluxe sheet (C109) | ||
| Laos | C109 proofs | Color proof strip | ||
| Laos | C109 ims | Imperforate MS4 | ||
| Laos | C108-C109 fdc1 | Two stamps and (black and brown printed and blue rubber-stamp) cachet on FDC | ||
| Laos | C108-C109 fdc2 | Two stamps and (blue rubber-stamp) cachet on FDC | ||
| Libya | 507 (Mi423) | 1973 | FDC1 cachet has same design as UN 49 and UN 50 | |
| Libya | 508 (Mi424) | |||
| Libya | 507-508 fdc1 | Two stamps on FDC (? cancel) | ||
| Libya | 507-508 fdc2 | Two stamps on FDC (? cancel, different) | ||
| Macau | 429 (Mi457) | CD61 | 1973 | |
| Malagasy Republic | C116 (Mi696) | 1973 | ||
| Malagasy Republic | C116 fdc | Stamp and (pictorial) cancel and (orange and blue and black printed) cachet on FDC | ||
| Maldive Islands | 464 (Mi479) i464 | Imperforate | 1974 | (note: mis-spelling of "metereological" instead of "meteorological") |
| Maldive Islands | 465 (Mi480) i465 | Imperforate | ||
| Maldive Islands | 466 (Mi481) i466 | Imperforate | ||
| Maldive Islands | 467 (Mi482) i467 | Imperforate | Also APT antenna (note: mis-spelling of "metereological" instead of "meteorological") | |
| Maldive Islands | 468 (Mi483) i468 | Imperforate | (note: mis-spelling of "metereological" instead of "meteorological") | |
| Maldive Islands | 469 (Mi484) i469 (Mi484) | Imperforate | ||
| Maldive Islands | 470 (Mi485) i470 | Imperforate | ||
| Maldive Islands | 471 (BL21) i471 | SS1 Imperforate SS1 | ||
| Mauritius | 405 (Mi397) | 1973 | ||
| Mauritius | 405 fdc | Stamp and (blue and black printed) cachet on FDC | ||
| Mexico | C415 (Mi1397) | 1973 | ||
| Mexico | C415 fdc1 | Stamp and (pictorial) cancel and (cyan and black printed) cachet on FDC | ||
| Mexico | C415 fdc2 | Stamp and (pictorial) cancel and (cyan printed) cachet on FDC | ||
| Mexico | C415 card | Stamp and (pictorial) cancel on FDC card (grey printed cachet, design like stamp) | ||
| Mexico | C415 folder | Stamp and (pictorial) cancel on FDC folder inside, also outside | ||
| Mongolia | C35 (Mi773) | 1973 | ||
| Morocco | 274 (Mi720) i274 | Imperforate | 1973 | |
| Morocco | 274 fdc1 | Stamp and (pictorial) cancel and (multi-color printed) cachet on FDC | ||
| Morocco | 274 fdc2 | Stamp and (pictorial) cancel and (red and black printed) cachet on FDC | ||
| Morocco | 274 essay1 | Essay | ||
| Morocco | 274 essay2 | Essay (different colors) | ||
| Morocco | 274 essay3 | Essay (different colors, and shifted background) | ||
| Mozambique | 509 (Mi568) | CD61 | 1973 | |
| Mozambique | 509 fdc | Stamp and (blue and black printed) cachet on FDC | ||
| Mozambique | 521 (Mi580) | 509 overprinted, CD61 | 1975 | |
| Mozambique | 521a (Mi none) | 509 overprint inverted, CD61 | ||
| Mozambique | 521 cover (Mi580 cover) | Four stamps on cover | 1979 | |
| Netherlands | 509 (Mi1016) | 1973 | ||
| Netherlands | 509 folder | FDC folder, also inside | ||
| Netherlands | 508-509 fdc | One of two stamps and (red and blue printed) cachet on FDC | ||
| Netherlands | 506-509 fdc | One of four stamps and (NVPH) cachet on FDC | ||
| New Caledonia | C101 (Mi533) iC101 | Imperforate | 1973 | Also 13th WMD |
| New Caledonia | C101 ds | Deluxe sheet (C101) | ||
| New Caledonia | C101 fdc1 | Stamp and (pictorial) cancel and (Éditions J.F.) cachet on FDC | ||
| New Caledonia | C101 fdc2 | Stamp and (pictorial) cancel and (multi-color printed) cachet on FDC | ||
| Niger | C214 (Mi380) iC214 | Imperforate | 1973 | Also 13th WMD |
| Niger | C214 proof | Signed proof | ||
| Niger | C214 proofs | Color proofs | ||
| Nigeria | 311 (Mi294) | 1973 | ||
| Nigeria | 311 essay1 | Adopted essay | ||
| Nigeria | 311 essay2 | Essay (different) | ||
| Nigeria | 311 essay3 | Essay (different) | ||
| Nigeria | 311-312 essay1 | Essay (12k) | ||
| Nigeria | 311-312 essay2 | Essay (12k, different) | ||
| Nigeria | 311-312 essay3 | Essay (18k) | ||
| Nigeria | 311-312 essay4 | Essay (18k, different) | ||
| Nigeria | 312 (Mi295) | |||
| Nigeria | 312 essay1 | Essay | ||
| Nigeria | 312 essay2 | Essay (different) | ||
| Nigeria | 312 essay3 | Essay (different) | ||
| Nigeria | 312 essay4 | Essay (different) | ||
| Pakistan | 338 (Mi341) | 1973 | ||
| Pakistan | 338 fdc1 | Stamp and (Karachi) cancel and cachet on FDC | ||
| Pakistan | 338 fdc2 | Stamp and (Lahore) cancel and cachet (same) on FDC | ||
| Poland | None | Postal card | 1973 | |
| Portuguese Guinea | 344 (Mi344) | CD61 | 1973 | |
| Qatar | 347 (Mi561) | 1973 | ||
| Qatar | 348 (Mi562) | |||
| Qatar | 349 (Mi563) | |||
| Qatar | 350 (Mi564) | |||
| Qatar | 351 (Mi565) | |||
| Qatar | 352 (Mi566) | |||
| Qatar | 353 (Mi567) | |||
| Rhodesia | 321 (Mi132) | 1973 | ||
| Rhodesia | 322 (Mi133) | |||
| Rhodesia | 323 (Mi134) | |||
| Rhodesia | 321-323 fdc | Three stamps and ((Rhodesia) Posts and Telecommunications Corporation) cachet on FDC | ||
| Romania | 2422 (Mi3128) | From MS50 (2422a (50x 2422)) | 1973 | |
| Romania | 2422 fdc | Stamp and cachet on FDC | ||
| Romania | None | (Multi-color printed, with blue sky) cachet on stamped envelope | 1973 | |
| Romania | None | (Multi-color printed, with purple sky) cachet on stamped envelope | 1973 | |
| St. Thomas and Prince Islands | 410 (Mi421) | CD61 | 1973 | |
| St. Thomas and Prince Islands | 410 fdc | Stamp on FDC | ||
| St. Thomas and Prince Islands | 434 (Mi445) | 410 overprinted, CD61 | 1977 | |
| Saudi Arabia | 670 (Mi577) | 1975 | "1973" | |
| Senegal | 394 (Mi533) | 1973 | ||
| Senegal | 394 proof1 | Signed proof (blue) | ||
| Senegal | 394 proof2 | Signed proof (black) | ||
| Senegal | 394 proof2 | Trial color proof pair | ||
| Senegal | 394 proof3 | Trial color proof pair (different) | ||
| Senegal | 394 fdc | Stamp and (pictorial) cancel and (blue and black printed) cachet on FDC | ||
| Sweden | 1001 (Mi807) | One of strip of 2 (1002a (1001-1002)) (Mi806-807) | 1973 | |
| Sweden | 1002a fdc1 | One of two stamps and (pictorial) cancel and cachet on FDC | ||
| Sweden | 1002a fdc2 | One of two stamps and (pictorial) cancel and cachet (different) on FDC | ||
| Sweden | 1002a fdc3 | One of two stamps and (pictorial) cancel on FDC, also insert | ||
| Switzerland (WMO) | 8O13 (Mi_OMM12) | Inscribed for 100th anniv. IMO-WMO | 1973 | 8O10-8O12 (the other members of the set of four) are not inscribed for 100th anniv. IMO-WMO. (For the complete set see the WMO page.) |
| Switzerland (WMO) | 8O13 fdc | Stamp and cachet on FDC | ||
| Switzerland (WMO) | 8O10-8O13 fdc | One of four stamps and cachet (same) on FDC | ||
| Switzerland (WMO) | 8O10-8O13 folder | FDC folder | ||
| Switzerland (WMO) | 8O10-8O13 sc | Souvenir card | ||
| Switzerland (WMO) | None | (Text) meter (Montbrillant) | 1973 | |
| Switzerland (WMO) | None | (Text) meter (Centre Intern., des Conferences) | 1973 | |
| Syria | 665 (Mi1253) | 1973 | ||
| Timor | 345 (Mi368) | CD61 | 1973 | |
| Togo | 852 (Mi997) | 1973 | ||
| Togo | C204 (Mi998) | |||
| Togo | 852+C204 fdc | Two stamps and (text) cancel and (ArtCraft) cachet on FDC | ||
| Trinidad and Tobago | 233 (Mi316) | 1973 | ||
| Trinidad and Tobago | 234a (BL7) | MS4 (231-234) | ||
| Tunisia | 620 (Mi824) | 1973 | ||
| Tunisia | 621 (Mi825) | |||
| Tunisia | 620-621 fdc1 | Two stamps and (pictorial) cancel and (Amicale philatélique tunisienne) cachet on FDC | ||
| Tunisia | 620-621 fdc2 | Two stamps and (pictorial) cancel on FDC (blank/no cachet) | ||
| United Nations (Geneva) | None | (Pictorial) cancel on cover | 1973 | |
| United States | None | (Florex-1973) cachet on cover | 1973 | |
Below is a list of IMO/WMO Centenary on launch covers (including anniversary-of-launch covers, and launch-related event covers).
| Country | Cancel Date | Cancel Location | Type of Item | Notes on Content |
|---|---|---|---|---|
| IMO/WMO Centenary (1873 — 1973) | ||||
| United States | 1973-11-06 | Vandenberg AFB, CA | (Space Voyage) cachet on NOAA-3 launch cover, also cachet detail | "IMO/WMO Centenary" |
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