Rolex Datejust 36mm Oystersteel features a blue dial with blue leather

Launched in 1945, the Datejust was the first self-winding waterproof chronometer wristwatch with a window displaying the date at 3 o’clock on the dial. This unique combination was further enhanced in 1953 with the magnifying effect of the Cyclops lens on the display. With these inventions, the Datejust embodied the quest for excellence of Rolex founder Hans Wilsdorf, who believed that watchmaking progress should encourage human progress. In an era of great change. The Datejust offers comfort as well as legibility and daily time management. Useful and practical, it was soon established as a precious instrument for the modern, independent, active wearer.

Created to improve the legibility of the date, the Cyclops lens is both an aesthetic and technical brand signature. This Rolex invention, named after the one-eyed giant in Greek mythology, was patented in the early 1950s and presented for the first time in 1953 on a Datejust. Its magnifying effect makes the date easier to read. Initially in plexiglass, it has been crafted in sapphire since the 1970s, like the watch’s crystal. Virtually impervious to scratches, the sapphire now features a double anti-reflective coating, making it even more effective.

For more than a century, gold and steel have come together in a pas de deux where sophistication meets strength. Created in the early 1930s, Rolesor features exclusively on Rolex watches in the Oyster Perpetual collection. The concept is simple: the bezel, the winding crown and the centre bracelet links are made of yellow or Everose gold while the middle case and outer links of the bracelet are made of Oystersteel. On white Rolesor models, the bezel alone is in white gold. These unique combinations are one of the brand’s signature features.

Model Case

Type

• Oyster, 36 mm,

Diameter

• 36 mm

Bezel

• Fluted

Oyster Architecture

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

Winding Crown

• Screw-down, Twinlock double waterproofness system

Crystal

• Scratch-resistant sapphire, Cyclops lens over the date

Water Resistance

• Waterproof to 100 metres / 330 feet

Movement

Type

• Perpetual, mechanical, self-winding

Calibre

• 3135, Manufacture Rolex

Precision

• +2/-2 sec/day, after casing

Oscillator

• Paramagnetic blue Parachrom hairspring. High-performance Paraflex shock absorbers

Winding

• Bidirectional self-winding via Perpetual rotor

Functions

• Centre hour, minute and seconds hands. Instantaneous date with rapid setting. Stop-seconds for precise time setting

Power reserve

• Approximately 48 hours

Bracelet

Type

• Leather

Bracelet Material

• Blue leather

Clasp

• Folding Oysterclasp with Easylink 5 mm comfort extension link

Dial

Type

• Blue

Certification

Superlative Chronometer (COSC + Rolex certification after casing)

Case reference 116139