Found this on watchrecon yesterday, decided to give it a go.

Seller is the first owner, bought it from Yokohama in 1982. No paperwork though.

 

Very cool.....

 

NASA alarm chronograph used since STS-5 be it in the blue-grey dial version... this black-grey dial version was used later on.

 

Oh thanks for the info! I got it for cheap, so i guess its not that bad haha