Thanks for the info. The Speedmaster is a classic... no matter which model. Wear it in good health!
Bezel edge to bezel edge it is 39.5. Wears a bit bigger because the case below the bezel actually is more like 41-42mm depending on where you measure it. Perfect size for me. Handwound with display back. MR had it for a price I could not refuse. They are not really accurate reps but they are really a sharp watch just as they are. Can't believe it took me this long to get one.