|2003 "Extreme Endeavours" series
or rocket launchers. A 'smiler' stamp and cancel celebrates the 40th anniversary of the moon landing and a cancel for the first commercial supersonic flight from Heathrow (the airport which replaced Croydon) is on the Charles Babbage stamp. The latter was a 1991 commemoration of his birth centenary. Babbage (1791-1871) and his Difference Engine which he later called an Analytical Engine is considered a computer pioneer in his quest to store data and then reuse the information to add more.
I like the whimsy of the cover, the Mars 'postage stamp' at the bottom and on the back there are stamps for a Mars Tourist visa, the moon station and the International Space Station and if you have enough money to go into space the $5000 Earth Tax mentioned there would be a snip.
An entry to Viridian Postcard's Sunday Stamps