- reference
116518LN
Case
Oyster, 40 mm, yellow gold
bezel
Black monobloc Cerachrom, engraved tachymeter
Waterproof performance
Water resistant to 100m/330ft
movement
Perpetual, mechanical chronograph, self-winding
Caliber
power reserve
about 72 hours
bracelet
oyster flex
champagne color & black


Tachymeter
A major feature of the model is the bezel engraved with a tachymeter scale for measuring up to 400 miles per hour or average speed. Combining high tech with sophisticated aesthetics, the black bezel is reminiscent of the 1965 model with its black Plexiglas bezel insert.
Champagne color & black dial
This model's champagne and black dial with counters features 18 ct gold hour markers and hands in Chromalight, a highly legible luminescent material. The sweeping seconds hand in the center measures to 1/8th of a second, while the two counters on the dial measure the hours and minutes and display the elapsed time. These features allow the driver to know exactly when the race will take place and decide on a winning strategy.


18 ct yellow gold
Owning its own foundry, Rolex has the expertise to cast the highest quality 18 ct gold alloys. Depending on the amount of silver, copper, platinum and palladium mixed together, different types of 18 ct gold are produced: yellow, pink and white. The extremely pure metals from which these alloys are made are scrutinized in our state-of-the-art laboratories. The gold alloy is then manufactured and shaped with the same meticulous care. Rolex's relentless pursuit of watchmaking extends to bare metal.

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