Boasting the iconic Speedmaster design with hints of the 1940s chronograph wristwatch concept, the OMEGA Speedmaster Chronoscope Co‑Axial Master Chronometer Chronograph Men\'s Watch features three sub dials to measure speed, distance and pulse. At A Glance  Presented on a perforated black leather strap with a red interior 43mm case size with 50m water resistance Silvery dial with blackened sub dials and black anodized aluminium bezel ring with tachymeter scale Leaf-shaped hands and Arabic numerals in blue, with a unique “spiral” track pattern running beneath the numbers Dial is printed with three distinctive timing scales in a 1940’s “snail” design, including a tachymeter scale, a pulsometer scale and a telemeter scale Black small-seconds counter at 9H, and a black 60-minute and 12-hour recorder at 3H with red hands Scratch‑resistant sapphire crystal with anti‑reflective treatment on both sides Powered by the manual-winding OMEGA Co-Axial Master Chronometer Calibre 9908 Power reserve of up to 60 hours