Speedmaster Professional Moonwatch
310.30.42.50.01.002
Lug-to-lug 47.5 mm 1.87 in
Case diameter 42 mm 1.65 in
Thickness 13.2 mm 0.52 in
Lug width 20 mm 0.79 in
Wrist fit reference
Balanced
Likely to sit comfortably within the wrist width for most wearers.
Estimated flat wrist width: 54.1 mm. Lug-to-lug uses 88% of it.
Sources
Confidence: medium
- https://www.omegawatches.com/watch-omega-speedmaster-moonwatch-professional-co-axial-master-chronometer-chronograph-42-mm-31030425001002
Manufacturer page plus community lug-to-lug measurements.