Omega Speedmaster Series Racing chronograph Watch 44.25mm to the Observatory Chronograph Model: 329.30.44.51.04.001 In 1957, Omega launched the Speedmaster series designed for motorsport, which is also known as the "Racing dials" white frosted dial with a unique racing style minute circle. Black ceramic outer ring, filled with white enamel test dial diameter 44.25mm equipped with 9900 to the Observatory double T movement Vibration frequency: 28800 oscillation times per hour Power storage: 60 hours steel case strap, arc arch double-sided anti-reflective anti-wear glass black and white color matching bright and classic, some people call this design "Panda plate".