310.55.42.50.02.001Ref

Debuting in 2023, the Speedmaster Moonwatch Professional 310.55.42.50.02.001 is a precious-metal Moonwatch in 18K Canopus Gold, featuring a 42 mm asymmetrical case, a matching five-arched-links-per-row bracelet, sapphire front and caseback, and a diamond-paved bezel that retains the classic fourth-generation Moonwatch geometry. Its sun-brushed silvery dial features applied Canopus Gold markers and hands, with a tri-compax chronograph (small seconds, 30-minute, 12-hour) and tonal contrast for legibility. It is powered by the manual-winding, METAS-certified Co-Axial Master Chronometer Calibre 3861 (15,000 gauss, meets precision/power reserve standards), visible through the sapphire caseback, combining historically grounded design with elevated materials and gem-setting.