Caliber: Omega 3603 Self-winding chronograph with column wheel mechanism, free sprung-balance and Co-Axial Escapement for greater precision and durability. 2nd time zone through 24 hour hand. 12 hour and 30 minute totalizers, stop second function, start/stop push button, return-to-zero push button. Rhodium plated finish and gold plated engravings. Officially certified chronometer.
Power reserve: 55 hours.
Power reserve: 55 hours.
Other versions of Speedmaster HB-SIA Co-Axial GMT Chronograph (2)
Titanium on rubber strap