| Type of Cover | Postmark Country | Postmark Place | Postmark Date | Cachet | Notes 1 or No. of Space Stamps | Notes 2 or Space Stamp Description | Comments |
|---|---|---|---|---|---|---|---|
| PRE51L | USA | MARSHALL SFC | 25/01/1979 | CHALLENGER ORBITER 099 | NONE | N/A | SHUTTLE ORBITERS NAMED AFTER SEA VESSELS |
| PRE51L | USA | PALMDALE | 30/06/1982 | RED-BLUE COVER (SV1557) | INCLUDES 1 x USA 18c STAMP | BENEFITING MANKIND | CHALLENGER ROLLED OUT FOR 1st PUBLIC DISPLAY |
| PRE51L | USA | PALMDALE | 1/07/1982 | PURPLE-ORANGE (SV1558) | INCLUDES 1 x USA 18c STAMP | BENEFITING MANKIND | CHALLENGER MAKES OVERLAND TRIP FROM PALMDALE |
| PRE51L | USA | EDWARDS | 1/07/1982 | BROWN-ORANGE (SV1559) | INCLUDES 1 x USA 18c STAMP | EXPLORING THE MOON | CHALLENGER ARRIVES EDWARDS AFB FROM PALMDALE |
| PRE51L | USA | EDWARDS | 4/07/1982 | CHALLANGER (sic) OV-099 | NONE | N/A | 1st FLIGHT OV-099 ABOARD THE MOTHER 747 |
| PRE51L | USA | HOUSTON | 1/12/1984 | 11,416 TEACHERS APPLY | NONE | N/A | AMERICAN TEACHER IS FIRST CITIZEN ON SHUTTLE |
| PRE51L | USA | HOUSTON | 19/07/1985 | ORANGE-BLUE-BROWN (SV2145) | NONE | N/A | NASA CHOOSES FIRST TEACHER TO FLY IN SPACE |
| PRE51L | USA | KENNEDY SPACE CENTER | 18/12/1985 | ORANGE-GREEN-BROWN (SV2253) | NONE | N/A | MATING |
| PRE51L | USA | KENNEDY SPACE CENTER | 22/12/1985 | ORANGE-BROWN (SV2254) | NONE | N/A | ROLLOUT (HANDCANCEL) |
| PRE51L | USA | EDWARDS | 1/07/1982 | RED-BLUE CHALLENGER DELIVERY CACH | NONE | N/A | (CHALLENGER MAKES OVERLAND TRIP TO EDWARDS) |
| PRE51L | USA | PALMDALE | 1/07/1982 | RED-BLUE CHALLENGER DELIVERY CACH | NONE | N/A | (CHALLENGER MAKES OVERLAND TRIP FROM PALMDAL) |
| PRE51L | USA | EDWARDS | 4/07/1982 | RED-BLUE CHALLENGER DELIVERY CACH | NONE | N/A | (1st FLIGHT OV-099 ABOARD THE MOTHER 747) |
| PRE51L | USA | KENNEDY SPACE CENTER | 5/07/1982 | RED-BLUE CHALLENGER DELIVERY CACH | NONE | N/A | (CHALLENGER ARRIVES AT KENNEDY SPACE CENTER) |
| PRE51L | USA | HOUSTON | 1/12/1984 | AMERICAN TEACHER FIRST ON SHUTTLE | NONE | N/A | NASA SEARCH BEGINS - SCCS CVR |
| PRE51L | USA | HOUSTON | 27/08/1984 | AMERICAN TEACHER FIRST ON SHUTTLE | NONE | N/A | 1st CITIZEN-PARTICIPANT A TEACHER - SCCS CVR |
| PRE51L | USA | HOUSTON | 1/02/1985 | AMERICAN TEACHER FIRST ON SHUTTLE | NONE | N/A | APPLICATION PERIOD FINISHES - SCCS CVR |
| PRE51L | USA | HOUSTON | 5/04/1985 | AMERICAN TEACHER FIRST ON SHUTTLE | NONE | N/A | MISSION FOR TEACHER SELECTED - SCCS CVR |
| PRE51L | USA | HOUSTON | 1/07/1985 | AMERICAN TEACHER FIRST ON SHUTTLE | NONE | N/A | TEN FINIALISTS ANNOUNCED - SCCS CVR |
| PRE51L | USA | HOUSTON | 9/07/1985 | AMERICAN TEACHER FIRST ON SHUTTLE | NONE | N/A | TEN FINIALISTS MEET THE PRESS - SCCS CVR |
| PRE51L | USA | HOUSTON | 19/07/1985 | AMERICAN TEACHER FIRST ON SHUTTLE | NONE | N/A | CHRISTA McAULIFFE SELECTED - SCCS CVR |
| PRE51L | USA | HOUSTON | 19/07/1985 | AMERICAN TEACHER FIRST ON SHUTTLE | NONE | N/A | BARBARA MORGAN SELECTED - SCCS CVR |
| PRE51L | USA | HOUSTON | 9/09/1985 | AMERICAN TEACHER FIRST ON SHUTTLE | NONE | N/A | CHRISTA McAULIFFE BEGINS TRAINING - SCCS CVR |
| PRE51L | USA | HOUSTON | 9/09/1985 | AMERICAN TEACHER FIRST ON SHUTTLE | NONE | N/A | BARBARA MORGAN BEGINS TRAINING - SCCS CVR |
Last Modified 15 August, 2003 by Dr R. J. Smith
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