Pre-owned Omega Speedmaster Chronoscope ref 329.30.43.51.02.001 (2021) is a combination of traditional Speedy design codes and chronograph watches produced by Omega in the 1940s. Like many Speedmaster watches, the case is surrounded by a Tachymeter bezel and features chronograph side pushers and twisted Lyre lugs. What sets this model apart from other variations is the silvery bi-compax dial decorated with vintage-inspired leaf hands, matching blue Arabic numerals, and multiple 1940s-inspired timing scales featuring a tachymeter scale, a pulsometer scale, and a telemeter scale. This model is made of steel and anodized aluminum and features the caliber 9908 self-winding Master Chronometer movement with a Co-Axial escapement and a 60-hour power reserve. Shop OMEGA Speedmaster Collection