A unique choice within the iconic Speedmaster collection, this OMEGA Speedmaster Chronoscope Co‑Axial Master Chronometer Chronograph Men\'s Watch takes design inspiration from the 1940s chronograph wristwatches. At A Glance  Presented on a stainless steel bracelet 43mm case size with 50m water resistance Blue dial with silvery sub dials and a blue anodized aluminium bezel ring and tachymeter scale Leaf-shaped hands and Arabic numerals, 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 Silvery small-seconds counter at 9H, and a silvery 60-minute and 12-hour recorder at 3H 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