GP-B

Gravity Probe (GP)
series satellites

GP-B patch
GP-BGP-B patch

This page contains philatelic information on the Gravity Probe (GP) series 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.

Launch information
(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)
Gravity Probe (GP) Gravity Probe (GP) Gravity Probe (GP)


Below is a list of Gravity Probe (GP) series satellite postal items (stamps, souvenir sheets, aerogrammes, postal cards, etc.).

CountryCatalog NumberType of ItemYear of IssueNotes on Content
Gravity Probe (GP)
Comoro Islands793 (Mi999A)
i793 (Mi999B)
More perforations than MS6 or SS11992(Gravity) "Probe-B" (GP-B)
Comoro Islands793_from_ms6 (Mi999A)
i793_from_ms6 (Mi999B)
One of MS6 (795a (790-795)) (Mi996A-1001A)
One of imperforate MS6 (i795a (i790-i795))
Comoro Islands793b (BL376A)
i793b (BL376B)
On stamp of SS1 (793)
On stamp of imperforate SS1 (i793)
Comoro IslandsUnlisted (Mi unlisted)
Unlisted imp
One of MS4 (a-d)
One of imperforate MS4 (a-d)
1999"Gravity Probe-B" (GP-B)
Comoro IslandsUnlisted ss1 (BL unlisted)
Unlisted iss1
On stamp of SS1
On stamp of imperforate SS1
Franklin Mint (USA)None(Bronze) medallion, also reverse1970s"Gravity Probe-A"
Guinea RepublicMi5873A-5878A
Mi5873B-5878B
MS6 (Mi5873A-5878A)
Imperforate MS6 (Mi5873B-5878B)
2008"Gravity Probe-B" (GP-B)
Guinea RepublicMi5873A-5878A_ms6 fdcMS6 on FDC
Guinea RepublicBL1585A
BL1585B
In (left) margin of SS1
In (left) margin of imperforate SS1
Guinea RepublicBL1585A misperfMis-perforated
Guinea RepublicBL1585A fdc
BL1585B fdc
SS1 and cachet on FDC
Imperforate SS1 and cachet on FDC
Guinea RepublicBL1963On stamp of SS12011"Gravity Probe-B" (GP-B)
Guinea RepublicBL1963 fdcSS1 on FDC
Guinea-BissauMi6493A
Mi6493B
One of MS4 (Mi6492A-6495A)
One of imperforate MS4 (Mi6492B-6495B)
2013GP-B
Guinea-BissauMi6492A-6495A_ms4 fdc1MS4 on FDC
Guinea-BissauMi6492A-6495A_ms4 fdc2MS4 on FDC (different)
Ivory CoastUnknown ss (BL?)
Unknown iss
On stamp of SS1
On stamp of imperforate SS1
2012GP-B
Ivory CoastUnknown fdc
Unknown ifdc
SS1 on FDC
Imperforate SS1 on FDC
Jersey (Great Britain)Unknown packPage2 of Presentation Pack with and page2 detail, also front and back and page12016(faint) GP-B
Korea (North)2912b (Mi3108)One of MS4 (2912 (a-d)) (BL255)1990like GP-B (but much earlier unknown)
Maldive IslandsMi5564-5567_ms4MS4 (Mi5564-5567)2015"Gravity Probe-B" (GP-B)
Maldive IslandsMi5564-5567_ms4 fdcMS4 and cachet on FDC
Maldive IslandsBL775SS1
Maldive IslandsBL775 fdcSS1 on FDC
RomaniaNoneCancel2005(Gravity) "Probe B" (GP-B)
RomaniaNoneCancel2005(Gravity) "Probe-A" (GP-A)


Below is a list of Gravity Probe (GP) series satellite launch covers (including anniversary-of-launch covers, and launch-related event covers).

CountryCancel DateCancel LocationType of ItemNotes on Content
Gravity Probe (GP)
1976-06-18: GP-A [sub-orbital]
United States1976-06-18Cape Canaveral FL(Space Voyage) cachet on coverGP-A (sub-orbital) rocket launch
United States1976-06-18Wallops Island VA(Space Voyage) cachet (different colors) on coverGP-A (sub-orbital) rocket launch
United States1976-06-18Wallops Island VA(Swanson green and magenta rubber-stamp) cachet on coverGP-A (sub-orbital) rocket launch
2004-04-20: GP-B1
United States2004-04-20Vandenberg AFB, Lompoc CA(Lollini) cachet on coverGP-B launch
United States2004-04-20Vandenberg AFB, Lompoc CA(Printed) cachet on coverGP-B launch
United States2004-04-20Vandenberg AFB, Lompoc CA(Printed) cachet (different) on coverGP-B launch
United States2004-04-20Vandenberg AFB, Lompoc CA(Printed) cachet (different) on coverGP-B launch
United States2004-04-20Vandenberg AFB, Lompoc CA(B&D) cachet on coverGP-B launch
United States2004-04-20Vandenberg AFB, Lompoc CA(SCP) cachet on coverGP-B launch

1GP-B newspaper article1 and article2.


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Updated: 2017-07-09