At the beginning of the 1970s, Rolex presented two new chronograph references 6263 and 6265, replacing the first Oyster Cosmograph ref. 6240. In production for 17 years until the end of 1987, the Cosmograph Daytona adopted the use of screw-down pushers to improve the waterproofing mechanism range from 50 to 100 meters. Available in stainless steel and gold with two-toned dial combination, the references were fitted with a bezel with black insert for the 6263, and a metal only bezel on the 6265 like the present lot.

Distinguished by its polished steel bezel with a monochromatic silver dial with striking black sub-registers, the present specimen from 1975 bears a designation that is extremely desirable amongst collectors when it comes to vintage timepieces of the 1970s, the Sigma dial. Sitting subtly at the bottom the sigma signs “σ T SWISS T σ”, these mark denotes that the markers are crafted in precious gold, emphasizing the value and high quality of Swiss watchmaking.

Extremely well-preserved, the present Sigma variant bears all period correct elements such as the 200-units bezel, “78350” Oyster bracelet and “571” endlinks. Stunningly attractive, the lume plots have also developed a warm patina with an elegant vintage appeal.