Discovery STS 51-D Operation Satellite Switch-On  Colorano "Silk" Cachet.  This is #S-190 in the 1995-1996 "Colorano "Silk" Cachets" catalog.

SELLER IS A MEMBER OF ASDA (AMERICAN STAMP DEALER'S ASSOCIATION), APS (AMERICAN PHILATELIC SOCIETY),  AND UPSS (UNITED POSTAL STATIONERY SOCIETY).

Combined shipping will be done on multiple lots.