Reference 16520 represents the Daytona's transformation from racing tool to modern icon. This 40mm stainless steel chronograph introduced automatic winding to the Cosmograph line, delivering track-proven precision with the durability that defined a new era for Rolex.

The case is crafted from solid Oystersteel in Rolex's signature architecture, featuring a fixed stainless steel bezel engraved with tachymetric scale and screw-down Triplock crown with chronograph pushers. Powered by Caliber 4030, based on the Zenith El Primero and heavily modified by Rolex for reliability. The white dial, framed by a scratch-resistant sapphire crystal, displays contrasting black-ringed sub-dials, luminous applied hour markers, and "DAYTONA" above 6 o'clock for instant recognition.

Water-resistant to 100 meters and fitted to a stainless steel Oyster bracelet with folding Oysterlock clasp, it embodies the motorsport authenticity that made the Daytona legendary.