Richard: Created page with "==Zenith El Primero== 1969 Zenith ElPrimero The El Primero 400 runs at 36,000 vibrations per hour offers a “minimum 50 hours” of power res..."

2020-04-05T01:02:46Z

Created page with "==Zenith El Primero== thumb|1969 Zenith ElPrimero The El Primero 400 runs at 36,000 vibrations per hour offers a “minimum 50 hours” of power res..."

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==Zenith El Primero==
[[File:Zenith 1969.jpg|thumb|1969 Zenith ElPrimero]]

The El Primero 400 runs at 36,000 vibrations per hour offers a “minimum 50 hours” of power reserve. A higher beat-rate, with the balance wheel making 10 semi-oscillations (5 left and 5 right turns) per second gives greater stability and resistance against shocks, positional errors, and other factors that negatively affect the timekeeping performance.

Zenith El Primero - Revision history

Richard: Created page with "==Zenith El Primero== 1969 Zenith ElPrimero The El Primero 400 runs at 36,000 vibrations per hour offers a “minimum 50 hours” of power res..."