There are 1,899 of them. The TWC Mission Chronograph represents America's contribution. Meet the man that's cataloging them all in one database.
Read the article here : https://www.hodinkee.com/articles/think-you-can-name-every-single-watch-thats-ever-gone-to-space#_=_
Towson Watch Company actually began with a request in 1998. A German scientist/mission specialist who was part of STS-99, a space shuttle mission to be flown on “Endeavor” in September 1999, requested that Balke and Thomas create a special watch for him to wear while in outer space. The pair produced two unique steel chronographs with casebacks engraved with the astronaut crew names and the mission designator, “SRTM-99.” The flight was actually delayed until February 2000, giving TWC’s chronographs the added distinction of being aboard on the first space shuttle mission of the new millennium. One of the timepieces was worn by the German astronaut. The second was donated by TWC to the National Watch and Clock Museum in Columbia, PA.
