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General| Movement | Automatic |
|---|---|
| Jewels | 31 |
| Year Introduced | 1969 |
| Case Material | Stainless steel |
| Power Reserve | 50 hours |
| Frequency | 36, 000 vibrations per hour (5 Hz) |
| Water Resistance | 50 meters |
| Strap/Bracelet | Stainless steel bracelet |
| Functions | Hours, minutes, chronograph, date |
Overview of the El Primero movement, its accuracy, and history.
Details the production statistics and components of the El Primero movement.
Technical specifications of the El Primero movement, including calibre, dimensions, and features.
Instructions on how to wind the El Primero watch using automatic movement.
Guidance on how to restart an El Primero watch that has stopped.
Steps for setting the time on El Primero watches, including date display considerations.
Procedure for setting the date on El Primero watches with standard or large date displays.
Instructions for setting the month and day of the week for triple calendar models.
How to use the chronograph functions, including start, stop, resume, and reset.
Introduction to the ultra-thin Elite automatic winding mechanical movement and its features.
Technical specifications for the Elite movement, covering calibre, dimensions, components, and features.
Guide on how to wind the Elite watch, which uses an automatic winding mechanical movement.
Instructions for restarting an Elite watch that has stopped working.
How to set the time on Elite watches, including notes on date display and stop-second mechanism.
Steps for setting the date on Elite watches with standard or large date (2 discs).
Details the El Primero 21 movement as a 1/100th second chronograph, a modern engineering feat.
Technical specifications for the El Primero 21 calibre 9004 movement.
Describes the functions of the El Primero 21, including time display and chronograph features.
Instructions for winding the El Primero 21 watch with an automatic winding mechanical movement.
How to wind the chronograph function of the El Primero 21 movement.
Information on the chronometer certification of the El Primero 9004 movement by TIMELAB.
Procedure for setting the time on El Primero 21 watches.
How to use the chronograph functions (Start/Stop, Resume, Resetting) on the El Primero 21.
Details the Zenith Oscillator Calibre 9100, highlighting its high frequency and innovative regulating organ.
Key points and technical specifications for the Zenith Oscillator Calibre 9100 movement.
Instructions on winding the Zenith Oscillator Calibre 9100 watch using its automatic movement.
Guidance on restarting the Zenith Oscillator Calibre 9100 watch if it has stopped.
Steps for accurately setting the time on Zenith Oscillator Calibre 9100 watches.
Explains Zenith's Zero G Gyroscopic Escapement, a complication for constant rate.
Instructions for winding the watch with the Zero G Gyroscopic Escapement.
Procedure for setting the time on watches with the Zero G Gyroscopic Escapement.
Description of the Fusee-Chain principle used to maintain constant torque in watch movements.
Details the operation of the Fusee-Chain system, explaining energy transmission to the movement.
Instructions on winding the watch with the Fusee-Chain mechanism.
Steps for setting the time on watches with the Fusee-Chain mechanism.
Guide to setting the perpetual calendar, including date and day adjustments.
Instructions on how to set the moon phase indicator on the watch.
Explanation of the Minute Repeater function and its chimes for hours, quarter-hours, and minutes.
Discusses the Equation of Time function and its relation to solar and civil time.
Procedure for setting the date for the Equation of Time function.
Details complications associated with the El Primero movement.
Explains the graduated sector indicating the remaining power reserve of the watch.
How to use the Flyback Chronograph for reset and instant start of timekeeping.
Instructions for measuring partial time and resetting the Split-Second Chronograph.
How to set and use the 24 Time Zones function on the watch.
Guide on winding, setting, and activating the alarm function of the watch.
Instructions for setting the day phase and moon phase indicators.
Steps for setting the annual calendar, which automatically accounts for month lengths.
Instructions for indicating and setting a second time zone on the watch.
Procedure for setting the moon phase, specifically for Calibre 691.
Procedure for setting the moon phase, specifically for Calibre 692 Lady Moonphase.
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