Jul 23, 2019
Source: http://twitter.com/PostalMuseum/status/1152231482133553153 Issued September 1969, this commemorative was the first “jumbo-size” US stamp. The engraved master die to make the stamp accompanied the astronauts to the moon’s surface & an envelope bearing a proof of the stamp was canceled in the space module. #Apollo11at50 pic.twitter.com/vwcTGBskAd — Postal Museum (@PostalMuseum) July 19, 2019
"First Man On The Moon" (Scott #C76)