Picked this up last Sunday and have been waiting for at strap until today. Nice condition except for the engraving that doesn't make sense to me (but properly for a previous owner that made it ) Ref. 145.029 Cal. 861 1970
Beautiful dial! Is your watch the same as this one: https://omegaforums.net/threads/number-on-omega-seamaster-case-back.22193/ ? Interesting if different.
I think the strap was this one: http://www.watch-band-center.com/watchstrap-p21045h254s258-Watch-strap-Nuerburg.html