Speedmaster Professional Moonwatch

Produced in 2003-2004, the 3570.31.00 is a 42 mm stainless steel Speedmaster Professional carrying the caliber 1861 manual-winding chronograph at 21,600 vph with a 48-hour reserve. It wears the standard black matte dial, aluminum tachymeter bezel, and 50 m rating on a steel bracelet, a short-lived…

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