SJX Watches
In-Depth: Rolex Daytona “Le Mans” Movement Cal. 4132
The cal. 4132 inside the Rolex Daytona “Le Mans” is a rare evolution of one of the most revered chronograph movements in modern watchmaking. Based on the long-running cal. 4130 platform, the new movement was developed specifically for the Daytona “Le Mans” unveiled in 2023 to celebrate the 100th anniversary of the famed endurance race. While visually similar to the cal. 4131 found in current-production Daytonas, the cal. 4132 incorporates a clever mechanical upgrade that allows it to record up to 24 hours of elapsed time. Given the relatively simple upgrade from a 12-hour to 24-hour counter, the cal. 4132 might seem like a weekend project for a brand with the engineering might of Rolex, but the reality is more nuanced. To achieve this, Rolex engineered a compact differential gear set that doubles the timing capacity without altering the core movement architecture, leaving the movement dimensions unchanged. As with many Rolex innovations, the cal. 4132 reflects the brand’s quiet obsession with functional longevity and serviceability. The latest Daytona movements reveal a degree of decorative finishing unseen in past generations of Rolex movements An already quirky base For over two decades, the Rolex cal. 4130 stood as the benchmark for industrial chronograph movements. Launched in 2000, the cal. 4130 was the first in-house chronograph movement developed by Rolex. The movement was lauded for its compact architecture, low component count, and ease of service – a...
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