Rolex Yacht-Master II — Reference 116681

Case

Case Size: 44 mm diameter

Case Material: Everose Rolesor (904L Oystersteel case with 18k Everose gold components)

Water Resistance: 100 meters / 330 feet

Caseback: Solid screw-down Oyster caseback

Bezel

Bezel Type: Bidirectional rotatable Ring Command bezel

Material: 18k Everose gold

Function: Mechanical interaction with the movement to set and synchronize the regatta countdown

Crystal

Scratch-resistant sapphire

Cyclops magnifying lens over the date at 3 o’clock

Movement

Movement: Rolex Calibre 4161

Type: Self-winding mechanical chronograph

Power Reserve: Approximately 72 hours

Oscillator / Balance

Blue Parachrom hairspring (paramagnetic)

Paraflex shock absorbers

Functions

Hours, minutes, seconds

Programmable regatta countdown (1–10 minutes)

Flyback chronograph

Mechanical synchronization via Ring Command bezel

Instantaneous date at 3 o’clock

Stop-seconds (hacking) for precise time-setting

Bracelet

Bracelet: Oyster bracelet (three-piece solid links)

Material: Oystersteel with center links in 18k Everose gold

Clasp

Folding Oysterlock safety clasp

Easylink comfort extension (5 mm)

Dial

Dial Color: White

Subdial: Blue regatta countdown at 6 o’clock

Yacht-Master II branding in blue

Markers / Hands

Applied hour markers in 18k gold

Chromalight luminescence (long-lasting blue glow)

Mercedes hour hand

Certification

Superlative Chronometer

COSC-certified movement

Rolex in-house testing after casing

Accuracy: −2 / +2 seconds per day