Rolex Daytona Steel

The Rolex Cosmograph Daytona 40mm Ref. 116520 occupies a singular position in modern watchmaking history as the first Daytona to house Rolex's fully in-house automatic chronograph movement. Introduced in 2000 and produced until 2016 when it was superseded by the ceramic-bezel 116500LN, this reference established a new benchmark for manufacture chronograph construction. The 40mm case is crafted from polished and brushed 904L Oystersteel, complemented by a fixed steel bezel engraved with a tachymetric scale for measuring average speeds up to 400 units, with screw-down chronograph pushers ensuring water integrity during use.

The Caliber 4130 represents Rolex's landmark achievement in chronograph engineering — the first automatic chronograph caliber developed entirely in-house. Operating at 28,800 vibrations per hour with just 44 jewels, the movement achieves COSC Superlative Chronometer precision at -2/+2 seconds per day while delivering a 72-hour power reserve, extraordinary for a chronograph of this complexity. A vertical clutch mechanism ensures a jump-free initiation of the chronograph seconds hand, while the column wheel guarantees precise pusher actuation. The entire mechanism requires approximately 60% fewer components than conventional column wheel chronographs, with mainspring replacement possible without removing the movement from the case.

The Oystersteel Oyster bracelet provides a robust yet refined wearing experience, secured by a folding Oysterlock clasp with Easylink comfort extension providing approximately 5mm of additional length. The white lacquered dial presents three recessed sub-dials: small seconds at 6 o'clock, 30-minute counter at 3 o'clock, and 12-hour counter at 9 o'clock, all with luminescent index markers for legibility. Flat scratch-resistant sapphire crystal with anti-reflective treatment protects the dial. Water resistance is rated to 100 metres. Buy this preowned Rolex Cosmograph Daytona 40mm Steel White Dial Ref. 116520 on Master Luxury with card at exclusive price.