310.30.42.50.01.002Ref

Debuting in 2021, the Speedmaster Moonwatch Professional 310.30.42.50.01.002 joins the current Moonwatch generation, introducing the Master Chronometer-certified Calibre 3861 while retaining classic Speedmaster construction and proportions, with a 42 mm stainless steel case (47.50 mm lug-to-lug, 13.18 mm thick) and a black anodised aluminium bezel featuring dot-over-90. The watch uses sapphire crystal on the front and caseback, offers 5 bar water resistance, and has a black step dial with applied markers, applied logo, Moonwatch hands, and tri-compax subdials. It is powered by the manual-winding Calibre 3861 (3 Hz, ~50-hour reserve, 15,000 gauss, rhodium-plated) and comes on a stainless steel bracelet with foldover clasp and comfort adjustment.