Case:
Diameter: 40 mm.
Stainless steel.
Smooth bezel.
Monobloc middle case.
Screw-down case back and winding crown.
Twinlock double waterproofness system.
Waterproof to 100 metres / 330 feet.

Dial:
Z-blue.
Highly legible chromalight display with long-lasting blue luminescence.
Green sapphire, scratch-resistant.

Movement:
Calibre 3131, Manufacture Rolex.
Precision of -2/+2 sec/day, after casing.
Centre hour, minute and seconds hands.
Stop-seconds for precise time setting.
Paramagnetic blue parachrom hairspring.
Bidirectional self-winding via perpetual rotor.
Superlative chronometer (COSC + Rolex certification after casing).
Power reserve of approximately 48 hours.
31 jewels.
Frequency: 28.800 v.p.h.

Bracelet:
Stainless steel.
Oyster, flat three-piece links.
Folding oysterclasp with easylink 5 mm comfort extension link.