Thanks Soroush! It was the first mechanical watch I ever owned and is still my favorite (I only own a couple watches), I probably spent about a year looking for it. (pawn shops, second hand watch stores, etc.)
Yes, you're right, it's affectionately called the "moon watch," selected by NASA for the Apollo program.
* The Omega Speedmaster was the first watch to be worn on the Moon with Apollo 11. In April 1970, it was used to manually time the secondary rocket burns to bring the crippled Apollo 13 spacecraft back to Earth.
Case back looks like this:
I was actually beginning to think it was a fairly decent investment, based on the appreciation from when I bought it, but of course, the cost to service a manual watch can be pricey, so I plan to just wear and enjoy it. It'll be it's own reward when I can pass it down to one of my sons and hope they will enjoy it as much as I have. And it wasn't expensive compared to many watches today, and is probably not considered an expensive or intricate piece. Just wanted to share the pic, since I was excited about the rejuvenation.