IQSY logo

International Quiet
Sun Year (IQSY)
(1964 — 1965)


Below is a checklist of International Quiet Sun Year (IQSY) 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.

See also the following related topic:

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)
International Quiet Sun Year (IQSY)
(1964 — 1965)
International Quiet Sun Year (IQSY)
(1964 — 1965)


Below is a list of International Quiet Sun Year (IQSY) on postal items (stamps, souvenir sheets, aerogrammes, postal cards, etc.).

CountryCatalog NumberType of ItemYear of IssueNotes on Content
International Quiet Sun Year (IQSY) (1964 — 1965)
ArgentinaNone(Printed) cachet on cover1964?IQSY logo; "IQSY 1964-1965"; National Commission for the IQSY (CNAISQ) (in Spanish text)
Argentina772 (Mi862)1965IQSY (on stamp), but IQSY-type Sun symbol
Argentina772 fdcStamp and cachet on FDC
ArgentinaC98 fdc1Cachet (same) on FDC
ArgentinaC98 fdc2Cachet (same) on FDC (different cancel)
Argentina772+C98-C99 fdc1One of three stamps on FDC
Argentina772+C98-C99 fdc2One of three stamps and cachet on FDC
Argentina772+C98-C99 fdc3One of three stamps and cachet (different) on FDC
Argentina772+C98-C99 fdc4One of three stamps and cachet (different) on FDC
Argentina772+C98-C99 fdc5One of three stamps and cachet (same) on FDC (different cancel)
Argentina772+C98-C99 fdc6One of three stamps and cachet (different) on FDC
Argentina772+C98-C99 fdc7One of three stamps and cachet (different) on FDC
Argentina772+C98-C99 folderFDC folder
ArgentinaNone(Red) cachet on cover1965IQSY logo
ArgentinaNone(Red and blue rubber-stamp) cachet on cover1965IQSY 1964/65 (in Spanish text)
AustriaNoneCancel and cachet on cover1965IQSY logo, "IQSY 1964/65" (in German text)
AustriaNoneCancel (same) on cover1965IQSY logo, "IQSY 1964/65" (in German text)
AustriaNoneCachet on cover, also back1968IQSY logo
Australian Antarctic TerritoryL2+2xL3 cover (Mi? cover)Cachet on cover1964"International Years of the Quiet Sun 1964 - 65"
Australian Antarctic TerritoryL6 cover (Mi? cover)Cachet on cover1964"International Years of the Quiet Sun 1964 - 65"
Australian Antarctic TerritoryL1 cover (Mi? cover)Cachet on cover1965"International Years of the Quiet Sun 1964 - 65"
Australian Antarctic TerritoryL1+L5 cover (Mi? cover)Cachet on cover1965"International Years of the Quiet Sun 1964 - 65"
Australian Antarctic TerritoryL6 cover (Mi? cover)Cachet on cover1965"International Years of the Quiet Sun 1964 - 65"
Australian Antarctic TerritoryL1 cover (Mi? cover)Cachet on cover1966"International Years of the Quiet Sun 1964 - 65"
Australian Antarctic TerritoryL2 cover (Mi? cover)Cachet on cover1966"International Years of the Quiet Sun 1964 - 65"
Australian Antarctic TerritoryL2+L4 cover (Mi? cover)Cachet on cover1966"International Years of the Quiet Sun 1964 - 65"
Australian Antarctic TerritoryL3 cover (Mi? cover)Cachet on cover1966"International Years of the Quiet Sun 1964 - 65"
British Antarctic Territory6 cover (Mi? cover)Cachet on cover1966"International Years of the Quiet Sun 1964 - 65"
Bulgaria1462 (Mi1589)1965
Bulgaria1463 (Mi1590)
Bulgaria1464 (Mi1591)
Bulgaria1462-1464 fdcThree stamps and cachet on FDC
Central African Republic34 (Mi57)
i34

Imperforate
1964
Central African Republic34 dsDeluxe sheet (34)
Central African Republic34 fdc1Stamp and cancel and (PJ) cachet on FDC
Central African Republic34 fdc2Stamp and cancel (same) and (╔ditions So.Ge.Im.) cachet on FDC
Central African Republic34 fdc3Stamp and cancel (same) and (╔ditions J.F.) cachet on FDC
Cuba958 (Mi1020)1965
Cuba959 (Mi1021)
Cuba960 (Mi1022)
Cuba961 (Mi1023)
Cuba962 (Mi1024)
Cuba963 (Mi1025)
Cuba958-960 fdcThree stamps and cancel and cachet on FDC
Cuba961-963 fdcThree stamps and cancel and cachet on FDC
Cuba963a (BL26)Imperforate SS1 (963)
Cuba963a fdcSS1 and cancel and cachet on FDC
Cuba963b (BL27)Imperforate SS1, 963a with changed colors and textThis item has no direct reference to IQSY, but its design is identical to that of 963a, which does directly reference IQSY
Czechoslovakia1289 (Mi1515)1965
Czechoslovakia1290 (Mi1516)
Czechoslovakia1289-1290 fdcTwo stamps and cancel and cachet on FDC
Dahomey196 (Mi244)
i196

Imperforate
1964
Dahomey196 fdcStamp and cancel and (PJ) cachet on FDC
Dahomey197 (Mi245)
i197

Imperforate
Dahomey197 fdcStamp and cancel (same) and (PJ) cachet on FDC
Dahomey196-197 fdc1Two stamps and cancel (same) and (╔ditions So.Ge.Im.) cachet on FDC
Dahomey196-197 fdc2Two stamps and cancel (same) and (╔ditions J.F.) cachet on FDC
EstoniaNoneCachet on cover1964IQSY-type Sun symbol and IQSY (in text)
French Southern and Antarctic Territories23 (Mi28)1963This stamp2 has an indirect relationship to the IQSY
French Southern and Antarctic Territories24 (Mi29)
French Southern and Antarctic Territories24 proofColor proof
French Southern and Antarctic Territories24 proofsColor proof strip
French Southern and Antarctic TerritoriesC6 (Mi30)
French Southern and Antarctic Territories24+C6 fdc1Two stamps and (green printed) cachet on FDC
French Southern and Antarctic Territories24+C6 fdc2Two stamps and (blue printed) cachet on FDC
Gabon179 (Mi215)1965
Gabon179 fdc1Stamp and cancel and (╔ditions J.F.) cachet on FDC
Gabon179 fdc2Stamp and cancel (same) and (printed) cachet on FDC
Gabon179 fdc3Stamp and cancel (same) and (PJ) cachet on FDC
Germany (East)745 (BL20)SS1 (Mi1081)1964
Germany (East)745 fdc1SS1 and cancel and cachet on FDC
Germany (East)745 cardSS1 and cancel and cachet on FDC card, also back
Germany (East)746 (BL21)SS1 (Mi1082)
Germany (East)746 fdcSS1 and cancel and cachet on FDC
Germany (East)746 cardSS1 and cancel and cachet on FDC card, also back
Germany (East)747 (BL22)SS1 (Mi1083)
Germany (East)747 fdcSS1 and cancel and cachet on FDC
Germany (East)747 cardSS1 and cancel and cachet on FDC card, also back
Germany (West)None(Black and red) cancels and (ISQY logo and Russia 2841) cachets on cover1964IQSY logo
Germany (West)None(Black) cancel (same) and (IQSY logo) cachet on cover1964IQSY logo
Germany (West)None(Black) cancel (same) and cachet on cover1964
Ghana164 (Mi170A)
i164 (Mi170B)

Imperforate
1964
Ghana165 (Mi171A)
i165 (Mi171B)

Imperforate
Ghana166 (Mi172A)
i166 (Mi172B)

Imperforate
Ghana164-166 fdcThree stamps and (Ghana Philatelic Agency) cachet on FDC
Ghana166a (BL9)Imperforate MS4 (4x 166)
Ghana166a fdcImperforate MS4 and (Ghana Philatelic Agency) cachet on FDC
Ghana186 (Mi185A)
i186 (Mi185B)
From MS12 (186a (12x 186))
From imperforate MS12 (i186a (12x i186))
1964
Ghana187 (Mi186A)
i187 (Mi186B)
From MS12 (187a (12x 187))
From imperforate MS12 (i187a (12x i187))
Ghana188 (Mi187A)
i188 (Mi187B)
From MS12 (188a (12x 188))
From imperforate MS12 (i188a (12x i188))
Hungary1659 (Mi2101A)
i1659 (Mi2101B)

Imperforate
1965
Hungary1660 (Mi2102A)
i1660 (Mi2102B)

Imperforate
Hungary1661 (Mi2103A)
i1661 (Mi2103B)

Imperforate
Hungary1662 (Mi2104A)
i1662 (Mi2104B)

Imperforate
Hungary1663 (Mi2105A)
i1663 (Mi2105B)

Imperforate
Hungary1664 (Mi2106A)
i1664 (Mi2106B)

Imperforate
Hungary1665 (Mi2107A)
i1665 (Mi2107B)

Imperforate
Hungary1659+1661+1666-1667 fdc
i1659+i1661+i1666-i1667 fdc
Four stamps and cachet on FDC
Four imperforate stamps and cachet on FDC
Hungary1660+1662-1665 fdc
i1660+i1662-i1665 fdc
Five stamps and cachet on FDC
Five imperforate stamps and cachet on FDC
Hungary1666 (Mi2108A)
i1666 (Mi2108B)

Imperforate
Hungary1667 (Mi2109A)
i1667 (Mi2109B)

Imperforate
Hungary1668 (BL46A)
i1668 (BL46B)
SS1 (Mi2110)
Imperforate SS1
Hungary1668 fdc
i1668 fdc
SS1 and cachet on FDC
Imperforate SS1 and FDC cancel
Hungary1668 cover (BL64A cover)SS1 and cachet on cover1965
ItalyNoneCachet on cover back1963IQSY logo
Maldive Islands147 (Mi147)1965
Maldive Islands147aMS9 (9x 147)
Maldive Islands148 (Mi148)
Maldive Islands148aMS9 (9x 148)
Maldive Islands149 (Mi149)
Maldive Islands149aMS9 (9x 149)
Maldive Islands150 (Mi150)
Maldive Islands150aMS9 (9x 150)
Mali65 (Mi90)1964
Mali65 fdc1Stamp and (╔ditions J.F.) cachet on FDC
Mali65 fdc2Stamp and (printed) cachet on FDC
Mali65 fdc3Stamp and (PJ) cachet on FDC
Mali65 proof1Proof (black)
Mali65 proof2Proof (red)
Mauritania176 (Mi231)
i176

Imperforate
1964
Mauritania176 dsDeluxe sheet (176)
Mauritania176 fdc1Stamp and cancel and (PJ) cachet on FDC
Mauritania176 fdc2Stamp and cancel and (╔ditions J.F.) cachet on FDC
Mauritania176 fdc3Stamp and cancel and (printed) cachet on FDC
Mongolia371 (Mi377)1965
Mongolia372 (Mi378)
Mongolia373 (Mi379)
Mongolia374 (Mi380)
Mongolia375 (Mi381)
MongoliaC6 (Mi382)
MongoliaC7 (Mi383)
MongoliaC8 (Mi384)
Mongolia371+373-374+C6 fdc1Four stamps on FDC
Mongolia371+373-374+C6 fdc2One of four stamps on FDC (no cancel)
Mongolia372+375+C7-C8 fdcFour stamps on FDC
New ZealandNoneCachet on cover1964"International Years of the Quiet Sun 1964 - 65"
Niger138 (Mi71)
i138

Imperforate
1964
Niger138 dsDeluxe sheet (138)
Niger138 fdcStamp and cancel and (blue and orange printed) cachet (design like stamp) on FDC
Niger138 proof1Proof (brown)
Niger138 proof2Proof (purple)
Nigeria173 (Mi164)1965
Nigeria173aMS12 (12x 173)
Nigeria174 (Mi165)
Nigeria174aMS12 (12x 174)
Nigeria173-174 fdcTwo stamps and (printed) cachet on FDC
PanamaC334a (BL36)
iC334a (BL37)
In (lower) margin of MS2 (C333-C334)
In (lower) margin of imperforate MS2 (iC333-iC334), changed colors
1965
Paraguay922 (Mi1522)
i922 (Mi1530)

Imperforate with changed colors
1966
Paraguay919-923 fdcOne of five stamps and cachet on FDC
Paraguay926 (Mi1526)
i926 (Mi1534)

Imperforate with changed colors
Paraguay926a (BL79)
i926a (BL80)
SS1 (926)
Imperforate SS1, changed colors
Paraguay926a fdc
i926a fdc
SS1 and cachet on FDC
Imperforate SS1 and cachet on FDC
Poland1343 (Mi1606)1965
Poland1343a (Mi1607)1343 changed colors
Poland1344 (Mi1608)
Poland1344a (Mi1609)1344 changed colors
Poland1345 (Mi1610)
Poland1345a (Mi1611)1345 changed colors
Poland1343-1345 fdcThree stamps and cancel and cachet on FDC
Poland1343a-1345a fdcThree stamps and cancel and cachet on FDC
Portugal934 (Mi966)1964
Portugal935 (Mi967)
Portugal934-935 fdcTwo stamps and cancel and (printed) cachet on FDC
Ross Dependency (NZ)NoneCachet on cover1964"International Years of the Quiet Sun 1964 - 65"
Russia (USSR)2839 (Mi2862)1964
Russia (USSR)2839 fdcStamp and cachet on FDC
Russia (USSR)2840 (Mi2863)
Russia (USSR)2841 (Mi2864)
Russia (USSR)2839-2841 fdcThree stamps and cancel on FDC
Russia (USSR)2839-2841 coverThree stamps and (TKK black printed and red printed) cachets on cover (AA no.12)11964"IQSY"
Russia (USSR)NonePrinted stamp (like 2839) and (black) cancel and cachet (design like stamp, as well as additional 2839 and 2840 stamps) on stamped envelope1964IQSY logo
Russia (USSR)NonePrinted stamp (like 2839) and (red) cancel and cachet (design like stamp) on stamped envelope1964IQSY logo
Russia (USSR)None(TKK blue printed) cachet on cover (AA no.19)11964IQSY-type Sun symbol
Russia (USSR)None(TKK black printed and red rubber-stamp) cachets on (un-stamped and un-canceled) cover (AA no.19)11964"IQSY" (in Estonian and Russian text)
Russia (USSR)None(TKK black printed and green rubber-stamp) cachets on (un-stamped and un-canceled) cover (AA no.19)1
Russia (USSR)None(TKK black printed and purple rubber-stamp) cachets on (un-stamped and un-canceled) cover (AA no.19)1
Russia (USSR)NonePrinted stamp (like 2839) and cachet (design like stamp) on stamped envelope1965
Satellite Beach FL (USA)Local1964?See also similar cachet on Explorer-30 launch cover
South GeorgiaNoneCachet on cover1964"International Years of the Quiet Sun 1964 - 65"
Togo500 (Mi446A)
i500 (Mi446B)

Imperforate
1964
Togo501 (Mi447A)
i501 (Mi447B)

Imperforate
Togo502 (Mi448A)
i502 (Mi448B)

Imperforate
Togo503 (Mi449A)
i503 (Mi449B)

Imperforate
Togo504 (Mi450A)
i504 (Mi450B)

Imperforate
Togo505 (Mi451A)
i505 (Mi451B)

Imperforate
Togo500-501+503 fdcThree stamps and cancel on FDC
Togo500-505 fdcSix stamps and cancel on FDC
Togo501-502+505 fdcThree stamps and cancel and cachet on FDC
Togo502+504-505 fdcThree stamps and cancel on FDC
Togo505a (BL17)Imperforate MS4 (502-505)
Togo505a fdcImperforate MS4 and cancel on FDC
United StatesNone(Interpex) cachet on cover1964IQSY logo
United States1107+1237 cover (Mi? cover)(RRI) cachet on cover1964ISQY logo; "IQSY"
United StatesNone(Purple rubber-stamp) cachet on cover1964"January 1, 1964 - Commemorating Start of IQSY"; also IQSY logo
United StatesNone(Brown printed) cachet on cover, also insert1964IQSY logo
United StatesNone ss(Interpex orange) cinderella SS11965IQSY logo
United StatesNone ss(Interpex yellow) cinderella SS11965IQSY logo
United States1107 cover (Mi? cover)Cinderella on rocket mail cover1965IQSY logo
United StatesNoneCinderella on rocket mail cover1965IQSY logo
United StatesNone ss
None iss
Rocket mail cinderella SS1
Rocket mail imperforate cinderella
1965IQSY logo
United StatesNone ssRocket mail cinderella SS1 (different color)1965IQSY logo
United StatesNone(USCS no.6927) cachet on cover1965"USNS Croatan in 1964, fitted out for rocket launch and telemetry as NASA Mobile Range during the International Year of the Quiet Sun"
United StatesNone(Mission 57) cachet on IGY cover back, also front2007"international cooperation...continued during the Solar Quiet Years project in 1964-65"
Upper Volta133 (Mi152)1964
Upper Volta133 fdcStamp and cancel and (╔ditions So.Ge.Im.) cachet on FDC
Vietnam (North)289 (Mi296)
i289

Imperforate
1964
Vietnam (North)290 (Mi297)
i290

Imperforate
Vietnam (North)289-290 fdcTwo stamps on FDC

1AA no.: Tartuski Klub Kollektsionerov (TKK) [Tartu Collector Club] "Astronautika Annaalid" number. See Jim Reichman's Philatelic Study Report on Tartu Space Club Covers, 1962-1978, 2011. (e-mail: jgreichman (at) datawest.net)
2The stamp shows the construction of a scientific base on ╬les de la Possession in the Crozet Islands. This was done in 1964 under the direction of meteorologist Alfred Faure. One of the seven buildings constructed was a terrestrial magnetism observatory. It was funded by the IQSY governing committee, and magnetic observations were made from this site in 1965 as part of the IQSY research program. The base was named for Alfred Faure in 1969 after his death in 1968.


Below is a list of International Quiet Sun Year (IQSY) on satellite and rocket launch covers (including anniversary-of-launch covers).

CountryCancel DateCancel LocationType of ItemNotes on Content
International Quiet Sun Year (IQSY) (1964 — 1965)
United States1963-11-27Cape Canaveral FL(Orbit Covers, no logo) cachet on Explorer-18 launch coverIQSY logo
Russia (USSR)1964-01-30 (from cachet)Tartu Club(TKK brown printed) cachets on (un-stamped and un-canceled) Elektron-1/2 launch cover (AA no.14)1IQSY logo
United States1964-03-27Wallops Island VA(Orbit Covers, no logo) cachet on Ariel-2 launch coverIQSY logo
Sweden1964-08-07Kabdalis(Printed) cachet on (sub-orbital) rocket launch coverIQSY logo
United States1964-09-05Patrick AFB, FL(SpaceCraft/Swanson) cachet on OGO-1 launch cover, also insertIQSY-type Sun symbol
United States1964-09-05Cape Canaveral FL(SpaceCraft/Swanson) cachet on OGO-1 launch cover, also insert
United States1965-05-29Cape Canaveral FL(Orbit Covers, no logo) cachet on Explorer-28 launch coverIQSY logo
United States1965-06-14Wallops Island VA(Swanson blue and magenta rubber-stamp) cachet on (sub-orbital) rocket launch coverIonospheric mission for "IQSY"
United States1965-06-14Wallops Island VA(Swanson green and magenta rubber-stamp) cachet on (sub-orbital) rocket launch cover
United States1965-08-25Cape Canaveral FL(Sarzin) cachet on OSO-C [failed] launch coverIQSY-type Sun symbol
United States1965-11-19Wallops Island VA(SpaceCraft/Swanson) cachet on Explorer-30 (SolRad-8) launch cover, also insertIQSY logo
United States1965-11-19Wallops Island VA(Sarzin) cachet on Explorer-30 (SolRad-8) launch coverIQSY acronym
United States1965-11-19Wallops Island VA(Rank velvet) cachet on Explorer-30 (SolRad-8) launch coverIQSY acronym; see also similar Satellite Beach local
United States1965-11-19Wallops Island VA(Rank velvet, trial with overlay) cachet on Explorer-30 (SolRad-8) launch coverIQSY acronym not visible due to overlay; see also similar Satellite Beach local
United States1965-11-19Wallops Island VA(Swanson blue and magenta rubber-stamp) cachet on Explorer-30 (SolRad-8) launch coverIQSY acronym
United States1965-11-19Wallops Island VA(Red printed) cachet on Explorer-30 (SolRad-8) launch cover"IQSY" logo
United States1971-09-29Titusville FL(Goldcraft) cachet on OSO-7 and TETR-4 launch cover"IYQS" (variation of IQSY acronym)
United States1973-10-26Cape Canaveral FL(Orbit Covers) cachet on Explorer-50 launch coverIQSY logo

1AA no.: Tartuski Klub Kollektsionerov (TKK) [Tartu Collector Club] "Astronautika Annaalid" number. See Jim Reichman's Philatelic Study Report on Tartu Space Club Covers, 1962-1978, 2011. (e-mail: jgreichman (at) datawest.net).


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