Speedmaster Professional Moonwatch

The 3573.50 distinguishes itself with the caliber 1863, the display-back variant of the 1861 movement, manual-winding at 21,600 vph with a 48-hour reserve. It keeps the canonical 42 mm stainless steel case, black matte dial, and aluminum tachymeter bezel rated to 50 m, on a matching steel bracelet.…

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