310.23.42.50.02.001Ref

Introduced in 2024, the Speedmaster Moonwatch Professional 310.23.42.50.02.001 combines a stainless steel 42 mm asymmetrical case with a Sedna Gold bezel featuring a black ceramic tachymeter and dot-over-90, measuring 47.50 mm lug-to-lug, 13.18 mm thick, water-resistant to 5 bar, with sapphire front and exhibition caseback. Its black stepped dial, evoking fourth-generation Speedmasters, has applied Sedna Gold markers and logo, Moonwatch hands, and tri-compax chronograph registers. It is powered by the manual-winding METAS-certified Calibre 3861 (3 Hz, ~50-hour power reserve, 15,000 gauss, free-sprung silicon balance, rhodium-plated) and is presented on a black alligator leather strap secured by a stainless steel foldover clasp.