The Yacht-Master was the first watch in Rolex’s Professional Oyster Collection to come in three different case sizes: 29, 35 and 40 mm. The model we tested, launched last year, is offered in two sizes: 37 and 40 mm. We chose the larger version, which we measured at precisely 40.19 mm in diameter and 11.49 mm in height (excluding the magnifying “Cyclops” lens for the date).
The well-known Cyclops date lens was patented by Rolex in 1953 and introduced in 1954 on the Datejust. This magnifying device is made of sapphire, like the watch’s crystal, and has nonreflective coating on both sides. The jumping date advances exactly at midnight.
The watch is powered by a seasoned caliber, the Rolex 3135, used in the very first Yacht-Master in 1992. The 3135 debuted in 1988 in the Submariner. The blue Parachrom balance spring was added to the movement in 2005, five years after it was first introduced in the Cosmograph Daytona. Its paramagnetic alloy resists changes caused by temperature variations and magnetic fields.
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