V2 rocket Peenemunde – small injection valve launch 2021—the same date shown by

2021—the same date shown by the cover’s onboard postmark

13 flights (by eight pilots) met the USAF's criteria for a spaceflight by passing an altitude of 50 miles (80 km) and the pilots were accordingly awarded astronaut status by the USAF

His mission demonstrated that American astronauts could train

and fans of German space achievements

V2 rocket Peenemunde – small injection valve launch 2021—the same date shown bySmall (ca. 1cm in diameter) injection valve from the combustion chamber of a German A4 V2 rocket from Peenemunde these were installed in the combustion chamber and later recovered from crashed V2 rockets. Vintage artifact from the beginning of the space age !