Rolex Chronograph 4100

The Reference 4100 is a rare manual-wind chronograph from the 1940s, prized for its large size and elegant design. The technical specification is a 36mm case, typically in stainless steel, with a non-Oyster, snap-on back and faceted “horn” lugs. It is a two-register chronograph powered by a Valjoux 22-based manual-wind movement. The dials are often two-tone silver and feature multiple scales, including tachymeter and telemeter tracks. Its significance lies in its large size for the era and its clean, classic chronograph design from the post-war period.