Pioneer-1

(Earlier)
Pioneer-series (non-planetary) satellites
(Pioneer-0 — Pioneer-E)

Pioneer-6/7/8/9 type
Pioneer-1Pioneer-6/7/8/9 type

This page contains philatelic information on the (earlier) Pioneer-series (non-planetary) satellites. Catalog numbers, years of issue, and notes on the satellites 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.

The first part of the Pioneer series, Pioneer-0 — Pioneer-E [which failed], were primarily lunar, solar, and inter-planetary exploration satellites. Only these (earlier) Pioneer (non-planetary) satellites are included here. The second part of the series, Pioneer-10 — Pioneer-13, were for exploration of the planets, including specific missions of two Pioneers to Jupiter/Saturn and two Pioneers to Venus. Those (later) Pioneer (planetary) satellites are covered elsewhere.

Launch information
(found elsewhere)
Reference images
(found elsewhere)
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)
(Earlier) Pioneer (non-planetary) (Earlier) Pioneer (non-planetary) (Earlier) Pioneer (non-planetary) (Earlier) Pioneer (non-planetary)
(Earlier) Pioneer (on other than Pioneer-0/E launch covers)
(Later) Pioneer (planetary) (Later) Pioneer (planetary) (Later) Pioneer (planetary) (Later) Pioneer (planetary)


Below is a list of (earlier) Pioneer-series (non-planetary) satellite postal items (stamps, souvenir sheets, aerogrammes, postal cards, etc.).

CountryCatalog NumberType of ItemYear of IssueNotes on Content
(Earlier) Pioneer (non-planetary)
BelgiumNoneIn (lower-middle and lower-right) margins of imperforate MS2 cinderella1963?Pioneer-0/1/2 type4 (in lower-middle margin); Pioneer-51 (in lower-right margin)
Bhutan406 (BL100)
i406
SS1
Imperforate SS1
1984Pioneer-51
Bhutan407 (BL101)
i407
In (upper-right) margin of SS1
In (upper-right) margin of imperforate SS1
Burundi133 (Mi174A)
i133 (Mi174B)

Imperforate
1965Pioneer-51
Burundi126+128-129+133 fdcOne of four stamps on FDC
Burundii126-i127+i131+i133 fdcOne of four imperforate stamps on FDC
Burundi133a (BL7A)
i133a (BL7B)
One stamp and in (center) margin of MS2 (131+133)
One stamp and in (center) margin of imperforate MS2 (i131+i133)
CamerounC84 (Mi502)
iC84

Imperforate
1967Pioneer-6/7/8/9 type3 ("Pioneer-A" (Pioneer-6), with folded antennas, date for Pioneer-1)
Central African RepublicBL574A
BL574B
In (right) margin of SS1, gold foil
In (right) margin of imperforate SS1, gold foil
1995"Pioneer-1" launch, "Pioneer-5"
Cuba1800 (Mi1875)1973Pioneer-3/4 type3
DjiboutiUnknown a (Mi?)
Unknown ia
One of MS9 (a-i)
One of imperforate MS9 (a-i)
2009"Pioneer-5"
DjiboutiUnknown proofSigned-proof imperforate MS9
Franklin Mint (USA)None(Bronze) medallion, also reverse1970s"Pioneer-5"
Franklin Mint (USA)None(Silver) medallion, also reverse"Pioneer-5"
FujeiraMi70A
Mi70B

Imperforate
1966Pioneer-51
FujeiraMi70A-77A fdcOne of eight stamps on FDC
FujeiraMi149A
Mi149B
Mi70A overprinted new currency
Mi70B overprinted new currency
1967Pioneer-51
FujeiraMi348A
Mi348B
Mi70A overprinted "Apollo-8"
Mi70B overprinted "Apollo-8"
1969Pioneer-51
FujeiraMi341A-348A fdcOne of eight stamps on FDC
Gambia3148 (Mi5955-5957)
i3148
MS6 (3148 (2x (a-c))), also strip of 3 detail
Imperforate MS6 (i3148 (2x (a-c)))
2008"Pioneer-1"
Gambia3148 fdcMS6 on FDC
Gambia3149 (Mi5958-5960)
i3149
MS6 (3149 (2x (a-c))), also strip of 3 detail
Imperforate MS6 (i3149 (2x (a-c)))
"Pioneer-3"
Gambia3149 fdcMS6 on FDC
Gambia3150 (Mi5961-5962)
i3150
MS4 (3150 (2x (a-b))), also strip of 2 detail
Imperforate MS4 (i3150 (2x (a-b)))
"Pioneer-1"
Gambia3150 fdc
i3150 fdc
MS4 on FDC
Imperforate MS4 on FDC
Gambia3151 (Mi5963-5964)
i3151
MS4 (3151 (2x (a-b))), also strip of 2 detail
Imperforate MS4 (i3151 (2x (a-b)))
"Pioneer-3"
Gambia3151 fdcMS4 on FDC
Gambia3152 (BL768)
i3152
SS1
Imperforate SS1
"Pioneer-1"
Gambia3152 fdc
i3152 fdc
SS1 on FDC
Imperforate SS1 on FDC
Gambia3153 (BL769)
i3153
SS1
Imperforate SS1
"Pioneer-3"
Gambia3153 fdc
i3153 fdc
SS1 on FDC
Imperforate SS1 on FDC
Germany (West)NoneCinderella (poster stamp), from MS30 cinderella~1966"Pioneer-4"
Germany (West)None"Pioneer-5"
Ghana164 (Mi170A)
i164 (Mi170B)

Imperforate
1964Pioneer-0/1/2 type4
Ghana165 (Mi171A)
i165 (Mi171B)

Imperforate
Ghana166 (Mi172A)
i166 (Mi172B)

Imperforate
Ghana164-166 fdcThree stamps on FDC
Ghana166a (BL9)On all four stamps and in (left and lower-right) margin of imperforate MS4 (4x 166)Pioneer-0/1/2 type4 (on stamps and in left margin), Pioneer-51 (in lower-right margin)
Ghana166a fdcImperforate MS4 on FDC
Ghana186 (Mi185A)
i186 (Mi185B)
From MS12 (186a (12x 186))
From imperforate MS12 (i186a (12x i186))
1964Pioneer-0/1/2 type4
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))
Guinea RepublicBL1476On stamp of SS12007Pioneer-5
Guinea RepublicBL1476 fdcSS1 on FDC
Guyana2876 (BL441)
i2876
On stamp of SS1
On stamp of imperforate SS1
1994"Pioneer-1 and 2" (in text, but Pioneer-10/11 type)
Haitim1310 (Mi unlisted) (Yv723)
im1310

Imperforate
1973Pioneer-6/7/8/9 type3 (with folded antennas)
Haitim1310 proof1Proof
Haitim1310 proof2Proof (different)
Haitim1310 proof3Proof (different)
Haitim1310 proof4Proof (different)
Haitim1310 proof5Proof (different)
Haitim1310 proof6Proof (different)
Haitim1310 proof7Proof (different)
Haitim1369 (Mi unlisted)
im1369
m1310 overprinted
im1310 overprinted
1974Pioneer-6/7/8/9 type3 (with folded antennas)
Haitim1368-m1379 fdcOne of 12 stamps on FDC
Korea (North)3663 (Mi3963)In (upper-right) margin of MS6 (3663 (a-e))1997Pioneer-P1/3/30/31 type
Micronesia989 (Mi?)In (left) margin of MS4 (989 (a-d))2012Pioneer-4
Micronesia990 (Mi?)In (left) margin of MS4 (990 (a-d))Pioneer-0
MongoliaC6 (Mi382)1965Pioneer-51
Mongolia371+373-374+C6 fdc1One of four stamps on FDC
Mongolia371+373-374+C6 fdc2One of four stamps on FDC (no cancel)
Montserrat891 (BL73)In (upper) margin of SS11996Pioneer-51
Nigeria143a (Mi134)In (lower-left) margin of MS12 (12x 143)1963Pioneer-0/1/2 type4
Nigeriai143aIn (lower-left) margin of "imperforate"5 MS12 (12x 143)
Nigeria144a (Mi135)In (lower-left) margin of MS12 (12x 144)
Nigeriai144aIn (lower-left) margin of "imperforate"5 MS12 (12x 144)
PanamaC334a (BL36)
iC334a (BL37)
In (lower) margin of MS2 (C333-C334)
In (lower) margin of imperforate MS2 (iC333-iC334), changed colors
1965Pioneer-0/1/2 type4
PanamaC336a (BL38)
iC336a (BL39)
In (lower-left) margin of MS2 (C335-C336)
In (lower-left) margin of imperforate MS2 (iC335-iC336), changed colors
Paraguay922 (Mi1522)
i922 (Mi1530)

Imperforate with changed colors
1966Pioneer-0/1/2 type4
Paraguay919-923 fdcOne of five stamps on FDC
Paraguay926 (Mi1526)
i926 (Mi1534)

Imperforate with changed colors
Paraguay926a (BL79)
i926a (BL80)
On stamp of SS1
On stamp of imperforate SS1, changed colors
Paraguay926a fdc
i926a fdc
SS1 and cachet on FDC
Imperforate SS1 and cachet on FDC
Qatar448 (Mi655)1975Pioneer-51
Rwanda136 (BL5A)
i136 (BL5B)
In (lower-middle and lower-left) margin of MS2 (136 (a-b))
In (lower-middle and lower-left) margin of imperforate MS2 (i136 (a-b))
1965Pioneer-0/1/2 type4 (in lower-middle margin), Pioneer-51 (in lower-left margin)
Sharjah44 (Mi56A)
i44 (Mi56B)

Imperforate
1964"Pioneer-5"1
Sharjah48b (BL4)Imperforate SS1
Sharjah44A (Mi unlisted)
i44A
44 overprinted new currency
i44 overprinted new currency
1967"Pioneer-5"1
SharjahMi1000A
Mi1000B

Imperforate
1972Pioneer-3/4 type3
SharjahMi1000 dsDeluxe sheet (Mi1000)
United Nations112-113 fdc (Mi122-123 fdc)(Orbit Covers) cachet on FDC1962"Pioneer-5"
United StatesNone(Astro Covers) cachet on cover1962"Pioneer" (in text)
United StatesC76 fdc (Mi990 fdc)(Centennial yellow earth) cachet on FDC1969Pioneer-3/4 type3
United StatesNone(Rockpex) cachet (with design similar to Centennial black rocket, type-1) cachet) on cover1971Pioneer-3/4 type3, Pioneer-5/Explorer-61
United States1556 fdc (Mi1164 fdc)(Orbit Covers) cachet on FDC1975Pioneer-0/1/2 type, Pioneer-3/4 type3, Pioneer-5 and Pioneer-6/7/8/9 type (on cachet); "Pioneer-1" - "Pioneer-11" (in text); (also depiction of Pioneer-10/11 type)
United States1916 fdc (Mi1485 fdc)(PCS golden-replica) insert from FDC, also front1981"Pioneer-5" (in text)
Yemen Arab Republic261 (Mi921)
261g (Mi928)

Imperforate with changed colors
1969"Pionneer-4", "Pionneer-5"1 (but Pioneer mis-spelled, with 2 n's in text)
Yugoslavia1045-1047 fdc (Mi1409-1411 fdc)Cachet on FDC1971Pioneer-0/1/2 type4 (but "Kosmos" in text)
Yugoslavia1048-1050 fdc1 (Mi1412-1414 fdc1)Cachet on FDC
Yugoslavia1048-1050 fdc2 (Mi1412-1414 fdc2)Cachet (different color) on FDC

1Pioneer-5 and Explorer-6 were similar "paddlewheel" satellites. It is believed that Explorer-6 contained two short antennas on its "top", whereas Pioneer-5 contained only a single short antenna. When there are no antennas on top, the distinction is unclear, but of the two, Pioneer-5 is assumed.
2Pioneer-3 and 4 are basically identical.
3Pioneer-6, 7, 8, and 9 are all basically identical.
4Pioneer-0, 1, and 2 are all basically identical.
5The "imperforate" sheets from Nigeria, i143a and i144a, are imperforate only in the surrounding margins, otherwise the stamps in both sheets are perforated on all sides.


Below is a list of (earlier) Pioneer-series (non-planetary) satellite launch covers (including anniversary-of-launch covers, and launch-related event covers).

CountryCancel DateCancel LocationType of ItemNotes on Content
(Earlier) Pioneer (non-planetary)
1958-10-11: Pioneer-1
United States1958-10-11Port Canaveral FL(Goldcraft Cachets) cachet on coverPioneer-1 launch
United States1958-10-11Patrick AFB, FL(Goldcraft) cachet on coverPioneer-1 launch
United States1958-10-11Port Canaveral FL(Sarzin) cachet on coverPioneer-1 launch
Pioneer-1 (anniversaries)
United States1978-10-11Moffett Field CA(NASA Ames Research Center) cachet on cover20th anniv. Pioneer-1 launch
1958-11-08: Pioneer-2 [failed]
United States1958-11-08Port Canaveral FL(Goldcraft Cachets) cachet on coverPioneer-2 launch [failed]
1958-12-06: Pioneer-3
United States1958-12-06Port Canaveral FL(Goldcraft Cachets) cachet on coverPioneer-3 launch
United States1958-12-06Cocoa Beach FL(Sticker) cachet on coverPioneer-3 launch
1959-03-03: Pioneer-4
United States1959-03-03Port Canaveral FL(Goldcraft Cachets) cachet on coverPioneer-4 launch
United States1959-03-03Patrick AFB, FL(Black rubber-stamp) cachet on coverPioneer-4 launch
United States1959-03-03Patrick AFB, FL(H. Flick) cachet on coverPioneer-4 launch
United States1959-03-03Patrick AFB, FL(H. Flick) cachet on (airmail) coverPioneer-4 launch
1959-11-26: Pioneer-P3 [failed]
United States1959-11-26Port Canaveral FL(Goldcraft Cachets) cachet on coverPioneer-P3 launch [failed]
1960-03-11: Pioneer-5
United States1960-03-11Patrick AFB, FL(Typed/printed) cachet on coverPioneer-5 launch
United States1960-03-11Port Canaveral FL(Goldcraft) cachet on coverPioneer-5 launch
United States1960-03-11Port Canaveral FL(Typed and hand-printed) cachet on coverPioneer-5 launch
United States1960-03-11Port Canaveral FL(Sarzin) cachet on coverPioneer-5 launch
United States1960-03-11Port Canaveral FL(Red and blue rubber-stamp) cachet on coverPioneer-5 launch
United States1960-03-11Port Canaveral FL(Sarzin) cachet on coverPioneer-5 launch
United States1960-03-11Cleveland OH(Printed) cachet on coverPioneer-5 launch
United States1960-03-11Patrick AFB, FL(Swanson blue rubber-stamp) cachet on coverPioneer-5 launch
United States1960-03-11Patrick AFB, FL(Swanson magenta rubber-stamp) cachet on (airmail) coverPioneer-5 launch
1960-09-25: Pioneer-P30 [failed]
United States1960-09-25Port Canaveral FL(Goldcraft Cachets) cachet on coverPioneer-P30 launch [failed]
1960-12-15: Pioneer-P31 [failed]
United States1960-12-15?Patrick AFB, FL(Swanson red and purple rubber-stamp) cachet on coverPioneer-P31 launch [failed]
1965-12-16: Pioneer-6
United States1965-12-16Cape Canaveral FL(DuBeau? blue and black rubber-stamp) cachet on coverPioneer-6 launch
United States1965-12-16Cape Canaveral FL(SpaceCraft/Swanson) cachet on cover, also insertPioneer-6 launch
United States1965-12-16Patrick AFB, FL(SpaceCraft/Swanson) cachet on cover, also insertPioneer-6 launch
United States1965-12-16Cape Canaveral FL(Sarzin) cachet on coverPioneer-6 launch
United States1965-12-16Cape Canaveral FL(Celestial) cachet on coverPioneer-6 launch (Pioneer-51 depicted)
United States1965-12-16Cape Canaveral FL(Centennial) cachet on coverPioneer-6 launch
Pioneer-6 (anniversaries)
United States1980-12-16Moffett Field CA(NASA Ames Research Center) cachet on cover15th anniv. Pioneer-6 launch
1966-08-17: Pioneer-7
United States1966-08-17Cape Canaveral FL(Orbit Covers) cachet on coverPioneer-7 launch
United States1966-08-17Patrick AFB, FL(SpaceCraft/Swanson) cachet on cover, also insertPioneer-7 launch
United States1966-08-17Cape Canaveral FL(SpaceCraft/Swanson) cachet on cover, also insertPioneer-7 launch
United States1966-08-17Cape Canaveral FL(Astro Covers, no logo) cachet on coverPioneer-7 launch
United States1966-08-17Kennedy Space Center FL(Astro Covers, no logo) cachet (same) on coverPioneer-7 launch
United States1966-08-17Kennedy Space Center FL(Astro Covers, no logo) cachet (slightly different) on coverPioneer-7 launch (mis-spelled "Pioneeer-7" in text)
United States1966-08-17Patrick AFB, FL(Sarzin) cachet on coverPioneer-7 launch
United States1966-08-17Cape Canaveral FL(Blue rubber-stamp) cachet on coverPioneer-7 launch
United States1966-08-17Cape Canaveral FL(Centennial black rocket, type-1) cachet on coverPioneer-7 launch (Pioneer-3/4 type2, Pioneer-5/Explorer-61, and Vanguard-2 depicted)
United States1966-08-17Cape Canaveral FL(Centennial green rocket, type-1) cachet on coverPioneer-7 launch (Pioneer-3/4 type2, Pioneer-5/Explorer-61, and Vanguard-2 depicted)
United States1966-08-17Cape Canaveral FL(HJM black) cachet on coverPioneer-7 launch (Explorer-10, Mariner-1/2 type, and Syncom depicted)
1967-12-13: Pioneer-8 (and TETR-1)
United States1967-12-13Patrick AFB, FL (hand cancel)(SpaceCraft/Swanson) cachet on cover, also insertPioneer-8 launch; Pioneer-7 (on insert)
United States1967-12-13Patrick AFB, FL (machine cancel)(SpaceCraft/Swanson) cachet on cover, also insertPioneer-8 launch; Pioneer-7 (on insert)
United States1967-12-13Cape Canaveral FL(SpaceCraft/Swanson) cachet on cover, also insertPioneer-8 launch; Pioneer-7 (on insert)
United States1967-12-13Cape Canaveral FL (machine cancel)(Orbit Covers, no logo) cachet on coverPioneer-8 launch
United States1967-12-13Cape Canaveral FL (hand cancel)(Orbit Covers, no logo) cachet on coverPioneer-8 launch
United States1967-12-13Kennedy Space Center FL(Centennial) cachet on coverPioneer-8 launch
United States1967-12-13Cape Canaveral FL(Centennial) cachet on coverPioneer-8 launch
United States1967-12-13Cape Canaveral FL(Sarzin) cachet on coverPioneer-8 launch (Ranger-3/4/5 type depicted)
United States1967-12-13Kennedy Space Center FL(Dubeau? red-brown rubber-stamp) cachet on coverPioneer-8 launch
1968-11-08: Pioneer-9 (and TETR-2)
United States1968-11-08Patrick AFB, FL (machine cancel)(SpaceCraft/Swanson) cachet on cover, also insert1, insert1 back, and insert2Pioneer-9 launch; "Pioneer-6", "Pioneer-7", and "Pioneer-8" (on insert1 back)
United States1968-11-08Patrick AFB, FL (hand cancel)(SpaceCraft/Swanson) cachet on cover, also insert1, insert1 back, and insert2Pioneer-9 launch; "Pioneer-6", "Pioneer-7", and "Pioneer-8" (on insert1 back)
United States1968-11-08Cape Canaveral FL (machine cancel)(SpaceCraft/Swanson) cachet on cover, also insert1, insert1 back, and insert2Pioneer-9 launch; "Pioneer-6", "Pioneer-7", and "Pioneer-8" (on insert1 back)
United States1968-11-08Cape Canaveral FL (hand cancel)(SpaceCraft/Swanson) cachet on cover, also insert1, insert1 back, and insert2Pioneer-9 launch; "Pioneer-6", "Pioneer-7", and "Pioneer-8" (on insert1 back)
United States1968-11-08Kennedy Space Center FL(SpaceCraft/Swanson) cachet on cover, also insert1, insert1 back, and insert2Pioneer-9 launch; "Pioneer-6", "Pioneer-7", and "Pioneer-8" (on insert1 back)
United States1968-11-08Cape Canaveral FL(Sarzin) cachet on coverPioneer-9 launch
United States1968-11-08Cape Canaveral FL(Whitney purple and cyan) cachet on coverPioneer-9 launch
United States1968-11-08Kennedy Space Center FL(R. DuBeau blue rubber-stamp) cachet on coverPioneer-9 launch
United States1968-11-08Cape Canaveral FL(Orbit Covers) cachet on coverPioneer-9 launch
United States1968-11-08Cape Canaveral FL(Orbit Covers and red rubber-stamp) cachets on coverPioneer-9 launch
United States1968-11-08Cape Canaveral FL(Centennial) cachet on coverPioneer-9 launch
United States1968-11-08Cape Canaveral FL(Blue printed) cachet on coverPioneer-9 launch
1969-08-27: Pioneer-E (and TETR-3) [failed]
United States1969-08-27Cape Canaveral FL (machine cancel)(SpaceCraft/Swanson) cachet on cover, also insertPioneer-E launch [failed] (not "Pioneer-10", as in text)
United States1969-08-27Cape Canaveral FL (hand cancel)(SpaceCraft/Swanson) cachet on cover, also insertPioneer-E launch [failed] (not "Pioneer-10", as in text)
United States1969-08-27Patrick AFB, FL(SpaceCraft/Swanson) cachet on cover, also insertPioneer-E launch [failed] (not "Pioneer-10", as in text)
United States1969-08-27Kennedy Space Center FL(SpaceCraft/Swanson) cachet on cover, also insertPioneer-E launch [failed] (not "Pioneer-10", as in text)
United States1969-08-27Cape Canaveral FL(Whitney blue and red and black) cachet on coverPioneer-E launch [failed] (not "Pioneer-10", as in text)
United States1969-08-27Patrick AFB, FL(Whitney blue and red and black) cachet on coverPioneer-E launch [failed] (not "Pioneer-10", as in text)
United States1969-08-27Colorado Springs CO(R.E. Nichol?) cachet on coverPioneer-E launch [failed] (not "Pioneer-10", as in text)
United States1969-08-28Cape Canaveral FL(Centennial yellow earth) cachet on coverPioneer-E launch [failed] (not "Pioneer-10", as in text); (Relay, Vanguard-2, Pioneer-3/4 type2, Explorer-1, TIROS/ESSA depicted)
(Earlier) Pioneer (on other than Pioneer-0/E launch covers)
United States1959-11-20Vandenberg AFB, CA(Goldcraft Cachets) cachet on Discoverer-8 launch coverPioneer-51
United States1960-04-15Vandenberg AFB, CA(Goldcraft Cachets blue) cachet on Discoverer-11 launch coverPioneer-51
United States1960-04-15Vandenberg AFB, CA(Goldcraft Cachets black) cachet on Discoverer-11 launch cover
United States1963-02-14Cape Canaveral FL(Centennial dark-blue earth) cachet on Syncom-1 launch coverPioneer-3/4 type2
United States1964-01-21Cape Canaveral FL(Centennial yellow earth) cachet on coverPioneer-3/4 type2
United States1964-03-19Cape Canaveral FL (machine cancel)(Centennial black rocket, type-1) cachet on Explorer-S66 launch coverPioneer-3/4 type2, Pioneer-51
United States1964-03-19Cape Canaveral FL (hand cancel)(Centennial black rocket, type-1) cachet (same) on Explorer-S66 launch cover
United States1964-12-21Cape Canaveral FL (hand cancel)(Centennial orange earth) cachet on Explorer-26 launch coverPioneer-3/4 type2
United States1964-12-21Cape Canaveral FL (machine cancel)(Centennial orange earth) cachet on Explorer-26 launch cover
United States1965-07-24Cape Canaveral FL(Printed) cachet on (sub-orbital) rocket launch cover, also annotatedPioneer-5
United States1965-11-19Wallops Island VA(Centennial black rocket, type-1) cachet on Explorer-30 launch coverPioneer-3/4 type2, Pioneer-51
United States1967-05-29Vandenberg AFB, CA(SpaceCraft/Swanson) insert1 from ESRO-2A launch cover (with ESRO logo in low position), also front and insert2 front and insert2 back"U. S. Pioneer" (in text)
United States1967-05-29Vandenberg AFB, CA(SpaceCraft/Swanson) insert1 from ESRO-2A launch cover (with ESRO logo in high position), also front and insert2 front and insert2 back
United States1967-07-01Cape Canaveral FL(Centennial orange rocket, type-1) cachet on IDCSP-16 — 19 launch coverPioneer-3/4 type2, Pioneer-51
United States1967-11-05Kennedy Space Center FL(Centennial orange earth) cachet on ATS-3 launch coverPioneer-3/4 type2
United States1967-11-06Cape Canaveral FL (hand cancel)(Centennial orange earth) cachet on ATS-3 launch cover
United States1967-11-06Cape Canaveral FL (machine cancel)(Centennial orange earth) cachet on ATS-3 launch cover
United States1968-01-11Vandenberg AFB, CA(Centennial brown rocket, type-2 and black text) cachet on Explorer-36 (GEOS-2) launch coverPioneer-51
United States1968-08-16Vandenberg AFB, CA(Centennial black rocket, type-1) cachet on OV5-8 and LCS-3 and SECOR-11/12 and 10 others [failed] launch coverPioneer-3/4 type2, Pioneer-51
United States1969-01-22Kennedy Space Center FL(Centennial red rocket, type-2 and black typed) cachet on OSO-5 launch coverPioneer-51
United States1969-04-13Vandenberg AFB, CA(Centennial brown rocket, type-2 and black text) cachet on Nimbus-3 and SECOR-13 launch coverPioneer-51
United States1969-06-21Vandenberg AFB, CA(Centennial red rocket, type-1) cachet on Explorer-41 launch coverPioneer-3/4 type2, Pioneer-51
United States1971-02-03Cape Canaveral FL(Centennial gray earth) cachet on NATO-2B launch coverPioneer-51
United States1972-01-31Lompoc CA, Vandenberg AFB(Centennial gray rocket, type-2 and red text) cachet on HEOS-2 launch coverPioneer-51
United States1972-03-24Lompoc CA, Vandenberg AFB(Centennial black rocket, type 1) cachet on DMSP-5B-F2 launch coverPioneer-3/4 type2, Pioneer-51
United States1973-10-26Cape Canaveral FL(Orbit Covers) cachet on Explorer-50 launch cover"Pioneer" (in text)

1Pioneer-5 and Explorer-6 were similar "paddlewheel" satellites. It is believed that Explorer-6 contained two short antennas on its "top", whereas Pioneer-5 contained only a single short antenna. When there are no antennas on top, the distinction is unclear, but of the two, Pioneer-5 is assumed.
2Pioneer-0, 1, and 2 are all basically identical.
3Pioneer-3 and 4 are basically identical.


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