YOU SHOULD KNOW : Rolex went all in with the Oysterquartz, developing a quartz movement that could be adjusted and serviced by a traditional watchmaker. THE FULL STORY It took Rolex more than five years to come up with an in-house quartz movement that the manufacture could be proud of, and in 1977, the Oysterquartz was born. Coming as a surprise to no one, the calibers 5035 (with date) and 5055 (with day and date) were indeed pretty spectacular, allowing for fine tuning and regular servicing just like their mechanical predecessors. The first Oysterquartz watches did not bear COSC certification; watches produced from late 1978 until 2001, when the Oysterquartz line retired, featured this certification. Brand : Rolex Model : Oysterquartz Reference : 17000 Diameter : 36 mm without crown Movement : Battery, works perfect Case Material : Steel , very good condition Bracelet material : Steel , very good condition, watch + band = 19 cm long Glass : Perfect condition Dial : Blue has nice patina Buckle: : Original Water resistance : 100m but We can´t guarantee Condition : Good, 8 condition about 10 condition Other specifications : Watch has old Rolex box