Speedmaster Professional Moonwatch

“Moonwatch Professional 1861 (Hesalite)”

This is the classic 1861 Moonwatch, the long-serving reference produced from 1996 to 2021 with the Hesalite crystal that NASA originally qualified for spaceflight. The caliber 1861 manual-winding chronograph runs at 21,600 vph with a 48-hour reserve inside a 42 mm stainless steel case, beneath a…

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