The PR is not proportional to the frequency.
By: mrds : December 27th, 2024-21:33
At 5 Hz it is 4 days, at 1.2 Hz it is 65 days. Powered by twin barrels. The tradeoff is lower accuracy at 1.2 Hz, meaning you will normally need to set the time after prolonged time at 1.2 Hz.
Winding is done conventionally via the crown.