The Omega Speedmaster Professional Moonwatch ref. 310.30.42.50.01.001 is the most iconic chronograph ever produced, famously worn during NASA’s Apollo missions. This 42mm stainless steel watch features the legendary black step dial with white luminous markers and chronograph subdials for maximum legibility. Powered by the manual‑wind Master Chronometer Calibre 3861, it offers exceptional accuracy, magnetic resistance, and a 50‑hour power reserve. The steel bracelet provides durability and comfort for daily wear. With its Dot‑Over‑90 tachymeter bezel and historic asymmetrical case, this Moonwatch remains one of the most desirable and collectible sports watches in modern horology.