Also here is some history of the Speedmaster and why the 105.012 model in particular became known as the moon watch
https://www.fratellowatches.com/speedmaster-became-moonwatch/
During your hunt for a 105.012 if it has a bracelet then it should tie in with this fantastic bracelet chart to be period correct for the 105.012 production years.
https://omegaforums.net/threads/vintage-speedmaster-bracelet-chart.29051/
Bracelet : "Clasp Stamp" / "End Link Stamp"
105.012-63 : Bracelet 7912 / 16 or 1506 / 16
105.012-64,65,66 : Bracelet 1506 / 16
Also when you do find one I strong suggest posting pictures in this forum and then the many speedmaster experts on here can advise you on condition, if it seems worth the price or if anything is incorrect.
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