Stamp "US in space-A Decade of... (1971)

Stamp "United States in Space - A Decade of Achievement" 1971

Face value: 2 x 8 Cents
Color: multicoloured
Perforation: 11
Mint condition
Original gum

Note: the stamps seem to me changed, as I only know this "duo" in reverse: "United states in Space" first, and then "A Decade of Achievement".
On the other hand, the perforation is displaced on both postage stamps.
Light blue at number 8 and "S" from "US".

For sale