Rolex Cosmograph Daytona 16523 “Zenith” The Rolex Oyster Perpetual Cosmograph Daytona reference 16523 is one of the most distinctive generations of the iconic Daytona collection. Produced between 1988 and 2000, this two-tone Rolesor model is widely known among collectors as the “Zenith Daytona”, referring to its Rolex Calibre 4030, based on the legendary Zenith El Primero chronograph movement. Specifications Brand: Rolex Collection: Cosmograph Daytona Model: Cosmograph Daytona “Zenith” Reference: 16523 Case diameter: 40 mm Case material: Stainless steel and 18-carat yellow gold Rolesor Bezel: Fixed 18-carat yellow gold tachymetric bezel Tachymeter scale: Graduated to 400 units per hour Dial: White Hour markers: Diamond-set hour markers surrounded by yellow gold Hands: Yellow gold Chronograph counters: Small seconds at 9 o’clock, 30-minute counter at 3 o’clock and 12-hour counter at 6 o’clock Dial details: Black and yellow-gold surrounds, red “DAYTONA” inscription Crystal: Scratch-resistant sapphire crystal Movement: Rolex Calibre 4030, self-winding mechanical chronograph movement Movement base: Zenith El Primero 400 Frequency: 28,800 vibrations per hour / 4 Hz Power reserve: Approximately 52–54 hours Functions: Hours, minutes, small seconds and chronograph Crown: Screw-down winding crown Pushers: Screw-down chronograph pushers Water resistance: 100 metres / 10 bar / 330 ft Bracelet: Rolex Oyster bracelet, reference 78393 Bracelet material: Stainless steel and 18-carat yellow gold Clasp: Rolex folding clasp Caseback: Solid stainless steel The Rolex Daytona reference 16523 belongs to the first generation of automatic Daytona watches. Its nickname “Zenith Daytona” comes from the use of the Zenith El Primero as the base for the Rolex Calibre 4030. This particular example is distinguished by its white dial with diamond-set hour markers, surrounded by yellow gold. The three black and yellow-gold bordered sub-dials and the red “DAYTONA” inscription create the characteristic appearance of this period. The two-tone Rolesor construction combines stainless steel with 18-carat yellow gold, used for the tachymetric bezel, crown, chronograph pushers and centre links of the Oyster bracelet. The watch is fitted with an Oyster bracelet, reference 78393, and is supplied with one additional bracelet link. Shipping: registered and insured, well packaged We ship your package from France but we are a swiss based company. EU customers don't pay taxes. Buyers outside the EU, please check their customs conditions.