Rolex bracelet clasps carry several distinctive features that are commonly examined during authentication and identification. Modern Rolex Oyster bracelets typically feature a folding Oysterlock or Oysterclasp with the Rolex crown logo embossed or engraved on the outer surface. Many current models include the Easylink comfort extension system, which allows the wearer to adjust the bracelet length by approximately 5 millimeters without tools. The clasp interior often displays reference codes, material stamps, and sometimes date-related markings that can help with identification.
The style and construction of Rolex clasps have evolved significantly over the decades, and these changes can help approximate the age of a bracelet. Vintage Rolex bracelets may feature stamped or riveted links and simpler clasp designs, while modern examples use solid end links (SEL) and more robust clasp mechanisms. The transition from stamped to solid components occurred gradually and varied by model line. Clasp codes, typically found stamped inside the clasp, can sometimes indicate the production quarter and year of the bracelet, though these codes are distinct from the watch case serial number and may not match the watch's production date if the bracelet has been replaced or serviced.