Omega Speedmaster Professional Moonwatch 3861 Stainless Steel / Black / Sapphire / Bracelet Ref. 310.30.42.50.01.002

The Omega Speedmaster Moonwatch Professional 310.30.42.50.01.002 debuted in 2021 as part of the current Moonwatch Professional generation, introducing the Master Chronometer-certified Calibre 3861 while retaining the defining construction and proportions of the historic Speedmaster. The watch is housed in a 42 mm stainless steel asymmetrical case with a lug-to-lug measurement of 47.50 mm and a thickness of approximately 13.18 mm. Water resistance is rated to 5 bar. A black anodised aluminium bezel with tachymeter scale frames the dial and retains the traditional dot over 90 detail. Sapphire crystal is fitted to both the front and the caseback, allowing visibility of the movement. The black step dial follows the fourth-generation Speedmaster layout and features applied hour markers and an applied Omega logo. Moonwatch-style hands are used throughout, with white chronograph scales providing contrast against the matte black surface. The chronograph display comprises a small seconds sub-dial, a 30-minute recorder, and a 12-hour recorder. Powering the watch is the manual-winding Omega Calibre 3861, certified as a Co-Axial Master Chronometer by METAS. The movement operates at a frequency of 3 Hz, delivers a power reserve of approximately 50 hours, and is resistant to magnetic fields up to 15,000 gauss. It incorporates a free-sprung balance with a silicon balance spring and features rhodium-plated finishing. The Speedmaster Moonwatch Professional 310.30.42.50.01.002 is fitted with a stainless steel bracelet secured by a foldover clasp with comfort adjustment.