Rolex Cosmograph Daytona. Here are the detailed specifications:

Case:

* Material: 18k yellow gold

* Diameter: 40 mm

* Thickness: 12.7 mm

* Water resistance: 100 meters (330 feet)

Movement:

* Caliber: 4131

* Type: Self-winding mechanical chronograph

* Functions: Hours, minutes, seconds, chronograph, tachymeter

* Power reserve: Approximately 72 hours

Dial:

* Color: White

* Indices: Luminescent hour markers and hands

Bezel:

* Material: Tachymeter scale

* Color: Black

Bracelet:

* Material: Oyster bracelet with folding clasp

* Color: 18k yellow gold

Other features:

* Superlative Chronometer certified by COSC

* Screw-down crown and caseback

* Pusher buttons for chronograph functions

Additional notes:

* The Rolex Cosmograph Daytona is a highly sought-after watch and can be difficult to obtain.