Originally Posted By: JHZR2
Originally Posted By: jaj
You're kidding right? A $0 cell phone is more accurate than that. My basic model stainless steel Rolex, now 21 years old, has been rock solid at 3 seconds a day fast for more than two decades, and that's because Rolex purposely sets them slightly fast to make sure you're never late if you're wearing one.
Lol, Rolex time is not exactly accurate, even with maintenance.
For a mechanical movement, Rolex's timekeeping is among the best. However, when compared with even the least expensive quartz movements...well, there is no comparison. This is one reason the COSC established different test protocols and parameters for quartz movements in order to certify them as "Chronometers." Under the mechanical test protocols, a no-name $20 quartz watch would pass the test as a chronometer.
When the COSC tightened the requirements for quartz chronometer certification in 2000, Rolex (which for years had the most quartz chronometers certified), found that their dated 5035 and 5055 movements would no longer pass the test. They had two choices: Introduce a new quartz movement to compete or abandon quartz chronometers. Even though Rolex had a new quartz movement ready for production (the 5335), they chose the latter and their famed Oysterquartz ceased production in 2001.
Rolex 5335 movement: