40 mm, yellow gold case. Before the Cosmograph Daytona was powered by the in-house cal. 4130 Perpetual movement, it relied on the outsourced Zenith "El Primero" movement. Also known as the cal. 4030, it was produced by Zenith and modified by Rolex to beat at a rate of 28,800 bph and remove the date aperture. Now that this movement has been discontinued, Rolex watches that utilize it have become coveted collector's items. We have no doubt that they will become even more desirable and valuable in the decades to come. If you're in the market for a Zenith Rolex Daytona, consider ref. 16518. It adds immense value to any watch box with stunning 18k yellow gold. While most Daytona watches are robust and sporty, this reference 16518 takes on a more refined and elegant aesthetic.
Rolex Cosmograph Daytona - 40 MM - Yellow Gold - 16518 whorl