Rolex Chronograph 3997

Last updated: July 9, 2025
Vintage Rolex Chronograph 3997 watch with a salmon dial, black leather strap, and two side buttons.

Brand: 

Model Line:

N/A

Production Period:

1940-1946

Caliber/s:

Case Width:

33mm

Case Height:

40mm

Lug Width:

18mm

Rolex Chronograph 3997 Description

The Reference 3997 is an early and uncommon non-Oyster chronograph from the 1940s. Its technical specification is a two-register chronograph layout, typically powered by the Valjoux 23 manual-wind movement. It is characterized by its smaller case size, measuring approximately 33mm in diameter, which was a standard men’s size for the era. The case, often found in stainless steel or gold, features a snap-on case back and simple pump pushers. Its significance lies in its representation of the classic, smaller European dress chronograph style.

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