310.32.42.50.01.002Ref

Debuting in 2021 in the updated Moonwatch Professional generation, the Speedmaster 310.32.42.50.01.002 houses the Co-Axial Master Chronometer Calibre 3861 in a 42 mm stainless steel asymmetrical case (47.50 mm lug-to-lug, 13.18 mm thick, 5 bar water resistance) with a black anodised aluminium bezel and dot-over-90. Sapphire crystal covers both front and caseback, revealing the movement, while the black step dial, in fourth-generation style, features applied markers, applied logo, Moonwatch hands, and tri-compax subdials. The manual-winding Calibre 3861 (3 Hz, ~50-hour power reserve, 15,000 gauss, silicon balance, rhodium-plated) is paired with a black calf leather strap and steel foldover clasp.