Day-Date I 36mm
The Rolex Oyster Perpetual Day-Date I is a 36mm watch and has been the flag ship watch. Designed in 1956 as the statesmans watch featuring both the oyster or presidential bracelet and available in Rolex's extremely precious metals. Featuring the parachrom hairspring, which improves accuracy by acting as a shock absorber the datejust has always been at the forefront of technology. 3155 Movement.