Zenith · El Primero
El Primero 3600
A high-frequency automatic chronograph designed to display tenths of a second.
At a glance
- Type
- Automatic mechanical
- Display / complication
- Chronograph
- Architecture
- 5 Hz, column-wheel chronograph
- Timebase
- 36,000 vph / 5 Hz
- Power reserve
- Approx. 60 h
Reference sources reviewed 7 November 2026. Published specifications, not independent measurements. Versions and complete-watch specifications can differ; fields without a verified figure are omitted or identified.
Find it in a watch
Zenith Chronomaster Original
An example from the linked references. Check the exact model and production generation.
What distinguishes it
Look beyond the reference.
The central chronograph hand makes a revolution in ten seconds. That display uses the 5 Hz balance’s ten beats per second to make the timing scale directly readable.
For the enthusiast
Resolution is not the same as accuracy: a tenth-second display does not promise that every measured interval is exact to a tenth. Compare the display with conventional 60-second chronographs.