Rolex Oyster Perpetual 31 mm Watch: 904L steel – M177200-0001

Model case

Model case

Oyster, 31 mm, steel

Oyster architecture

Monobloc middle case, screw-down case back and winding crown

Diameter

31 mm

Material

904L steel

Bezel

Domed

Winding crown

Screw-down, Twinlock double waterproofness system

Crystal

Scratch-resistant sapphire

Water-resistance

Waterproof to 100 metres / 330 feet

Movement

Movement

Perpetual, mechanical, self-winding

Calibre

2231, Manufacture Rolex

Precision

Officially certified Swiss chronometer (COSC)

Winding

Bidirectional self-winding via Perpetual rotor

Bracelet

Bracelet

Oyster, flat three-piece links

Bracelet material

904L steel

Clasp

Oysterclasp

Dial

Dial

White

As forerunners, the Oyster Perpetual models are among the most recognizable in a collection of legendary watches. They have retained their unmistakable aesthetic association with the original Rolex Oysters while evolving with the watchmaking know-how of Rolex.