310.30.42.50.04.001Ref

Debuting in 2024, the Speedmaster Moonwatch Professional 310.30.42.50.04.001 offers a white lacquered dial within the Moonwatch Professional line, featuring 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. Both the front and caseback are sapphire, with anti-reflective treatment inside the front, and the white step dial, inspired by fourth-generation models, includes applied markers, applied logo, Moonwatch hands, and tri-compax chronograph. It is powered by the manual-winding METAS-certified Calibre 3861 (3 Hz, ~50-hour reserve, 15,000 gauss, silicon balance) and comes on a stainless steel bracelet with foldover clasp and comfort adjustment.