Speedmaster Professional Moonwatch

“Moonwatch Professional 3861 (sapphire sandwich)”

The 'sapphire sandwich' of 2021-2022 is the modern Moonwatch update powered by the upgraded caliber 3861, manual-winding at 21,600 vph with a 50-hour reserve, visible through sapphire crystals front and back. It keeps the 42 mm stainless steel case, black matte dial, aluminum tachymeter bezel, and…

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