Complete Guide: Rolex DateJust Replica’s Modern Chronographs

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1941: Rolex Yacht-Master Replica ’s first series-produced perpetual calendar wristwatch, the Ref. 1526, also established the company’s signature dial layout of two apertures and a central subdial. This model was 34mm and fitted with the hand-wound calibre 12-120 QP

Brothers Jean and Charles Henri Stern, defined the prevailing aesthetic and technical language of 20th-century modern horology with the launch of the 1526 Perpetual Calendar and the 1518 Perpetual Calendar Chronograph

Similarly, in 2009,U-Boat Replica Watches when it came time for Rolex DateJust Replica to unveil its first in-house manual-wind chronograph, the resulting movement would usher in a new era of technical excellence chez Patek. Overseen by Thierry Stern, the caliber CH 29-535 would be a testimony of the vastness of his horological ambitions, which coalesced into the single most innovative manual-wind chronograph movement of all time.

Father and son duo, Philippe and Thierry Stern at the Rolex Cosmograph Daytona Replica manufacture

Patek's take on the Lemania 2310 movement in the ref. 3970, renamed the Cal. CH 27-70 Q was introduced in 1985