| Brand: | Zenith |
|---|---|
| Family: | Zenith > Calibers |
| Reference: | El Primero 400 Mã chính thức do nhà sản xuất đặt |
| SKU: | Zenith400 (Cal. 40.0) Product codes are set by thuviendongho to help classify and identify them more easily |
| Name: | El Primero 400 |
| Produced: | 1985 - 2022? Discontinued |
| Country of Manufacture |
|---|
| Caliber | |
|---|---|
| Movement type | |
| Functions | |
| Chronograph |
Column wheel, 60-second counter, 12-hour counter, 30-minute counter |
| Display |
6 hands, Central hour hand, Central minute hand, Small second hand at 9:00, Central second chronograph hand, 30-minute chronograph hand at 3:00, 12-hour chronograph hand at 6:00, Date window at 4:30 |
| Power reserve | |
| Jewel | |
| Frequency |
| Escapement | |
|---|---|
| Anti-Shock System | |
| Rotor style | |
| Rotor winding direction | |
| Balance | |
| Balance Spring | |
| Lift Angle | |
| Number of parts |
This self-winding chronograph movement bases on the calibre El Primero by Zenith (Calibre Zenith 400) and has been modified by Rolex.
The fast-oscillating Zenith calibre has been clocked down from 36,000 A/h to 28,800 A/h and has been provided with a Breguet hairspring and with microstella screws.
It was used in the model Rolex Oyster Perpetual Cosmograph Daytona till 2000. Afterwards it was replaced by the Rolex-own development Rolex 4130.
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