Omega Speedmaster Professional Moonwatch 3861 Stainless Steel / Black / Plexi / Fabric Ref. 310.32.42.50.01.001

The Omega Speedmaster Moonwatch Professional 310.32.42.50.01.001 debuted in 2021 as part of the renewed Moonwatch Professional generation featuring the manually wound Calibre 3861, continuing the lineage of the Speedmaster as a historically significant space-qualified chronograph. The watch features 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 surrounds the dial and retains the traditional dot over 90 marking. The front is fitted with a hesalite crystal, while the caseback is executed in solid stainless steel, consistent with classic Moonwatch construction. The black step dial follows the fourth-generation Speedmaster layout and features printed hour markers, printed Omega logo, and white chronograph scales. Moonwatch-style hands are used throughout. The chronograph display comprises a small seconds sub-dial, a 30-minute recorder, and a 12-hour recorder arranged in a tri-compax configuration. Powering the watch is the manual-winding Omega Calibre 3861, a Co-Axial Master Chronometer certified by METAS. Operating at a frequency of 3 Hz, the movement offers a power reserve of approximately 50 hours and resistance to magnetic fields up to 15,000 gauss. The calibre incorporates a free-sprung balance with a silicon balance spring and is finished with rhodium-plated components. The Speedmaster Moonwatch Professional 310.32.42.50.01.001 is delivered on a black coated nylon fabric strap secured with a stainless steel foldover clasp.