ROLEX - Lot 386

ROLEX Daytona Zenith "Inverted 6 Art.-No. 16528 No. X506280 Circa 1991 Chronograph bracelet in 18k (750) yellow gold Case: round, tachometric bezel, screw-down crown, round push-pieces, screw-down back, numbered "16500 Dial: gilt "T SWISS MADE T" known as "Inverted 6", applied indexes, painted minute track, luminescent hands, central chronograph seconds, 30-minute counter at 3 o'clock, 12-hour chronograph counter with inverted 6 index at 6 o'clock, small seconds at 9 o'clock, signed Movement: automatic, chronometer-certified, signed - Caliber 4030 (Zenith El Primero base) Bracelet/Fastener: 18k (750) yellow gold Oyster bracelet with folding clasp, signed Diameter: 40 mm Gross weight: 162.2 g. Wrist circumference: approx. 18 cm With: wooden case, signed Rolex Condition report given as an indication: at time of writing, slight traces of wear from use, movement functional at time of writing, servicing recommended, no warranty. Rolex, renowned for its wrist chronographs, wanted to offer their first automatic-caliber chronograph in the late '80s. Despite a wide variety of automatic calibers, they didn't have the technical know-how to build a manufacture movement. So they turned to Zenith, which had been offering an automatic chronograph caliber for over 10 years: the El Primero. Rolex used it as the basis for the 4030 caliber, reducing the frequency and removing the date function. It was not until the introduction of reference 116520 that the first Rolex Manufacture chronograph caliber was introduced. Today, Daytonas equipped with the 4030 movement (nicknamed "Daytona Zenith") are sought after by collectors for their rarity. The watch was revised in November 2025.