Może warto doczytać ze szczegółami, a nie powielać tylko schematy.
Rolex Caliber 4030 vs. Caliber 4130
The first batch of automatic Daytona watches housed the Rolex Caliber 4030, which was based on the El-Primero Caliber 400 by Zenith. Caliber 400 was, in fact, a resurrection (brought back in 1985) of the pioneering Zenith El-Primero Cal. 3019PHC made from 1969-1975. You may recall that Zenith was one of the first watchmakers (it’s an on-going debate in the watch world as to who can actually claim the title of the very first) to produce a self-winding chronograph movement in 1969.
Although the Zenith Caliber 400 was a fantastic self-winding chronograph movement, Rolex did heavily modify it according to the needs of the Daytona. After all was said and done, only about 50% of the original base remained. Some of the most noteworthy modifications included reducing the frequency rate from 36,000 beats per hour to 28,800bph, removing the date function, and adding a new escapement with a Breguet overcoil. The Caliber 4030 uses a lateral clutch chronograph system and has a 54-hour power reserve. Zenith Daytona watches have five-digit reference numbers (165xx) and were produced from 1988 until 2000.