For what i know is that someone from the Nasa walked in a watch boutique and ask an employer which watch is very good and can deal with harsh conditions. He or she took the speedmaster to the lab and tested if the Omega could be go on a mission to the moo...
"This watch is also a slice of history. In the early 1970s, Nasa astronaut Colonel William Pogue was assigned to crew the first US space station, Skylab. In testing, Pogue did not have access to a standard-issue Omega Speedmaster as these weren’t supplied...
Again i learned more about watches who where in space. Than i give you also knowledge. Dutch astronaut Andre Kuypers wore a R O watch in the spaceshuttle. R O is an independent who produce all in house. R O made special complications for Andre to time typ...