wsfarrell
·Looks like a 145.012 to me, with a 145.022 69 ST caseback. I'm no expert though.
https://www.hqmilton.com/timepieces/v0q6j137/1969-omega-speedmaster-145.022-pre-moon-321-8226
https://www.hqmilton.com/timepieces/v0q6j137/1969-omega-speedmaster-145.022-pre-moon-321-8226