Replica Audemars Piguet Royal Oak Chronograph Blue Grande Watch 26450ST.OO.1356ST.01

 Earlier this year, Audemars Piguet undertook a "generational update" of a pivotal model within its core collection: the 38mm Royal Oak Chronograph. With the launch of the "new generation" 38mm Royal Oak Chronograph—now fully equipped with Audemars Piguet’s new in-house Calibre 6401 automatic chronograph movement—the era of the 38mm Royal Oak Chronograph relying on outsourced movements has officially come to an end. Below, drawing upon the technical specifications currently released, I will provide a comprehensive analysis of Audemars Piguet’s "new generation" 38mm Royal Oak Chronograph. The Audemars Piguet Royal Oak Chronograph line comprises two distinct versions: the large-format 41mm model and the mid-sized 38mm model. Of these, the 41mm model (Reference 26240) had already undergone its generational update in 2022, adopting Audemars Piguet’s in-house Calibre 4401 automatic chronograph movement. This year, the 38mm model has finally completed its own update, Audemars Piguet Royal Oak replica watches.

Prior to this, the 38mm Royal Oak Chronograph had consistently utilized the outsourced FP1185 automatic chronograph movement. Given that the FP1185 movement originated in 1988 and has been in continuous use since then, its performance no longer offered a competitive advantage. Consequently, Audemars Piguet specifically developed the more compact, in-house Calibre 6401 automatic chronograph movement—tailored for the mid-sized 38mm case—to serve as a direct replacement for the FP1185. Audemars Piguet’s new Calibre 6401 features a column wheel and a vertical clutch; it measures 27mm in diameter and 5.7mm in thickness. Compared to the 32mm Calibre 4401 (found in the 41mm Royal Oak Chronograph), its dimensions are notably more compact. In terms of performance, the in-house Calibre 6401 represents a significant improvement over its predecessor, the FP1185: the balance frequency has been increased to 28,800 vibrations per hour, and the power reserve has been extended to 55 hours. Most crucially, the Calibre 6401 features a modified vertical clutch architecture, incorporating what Audemars Piguet describes as an "innovative caliper structure" within its new vertical coupling mechanism.