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Watch Winding Specifications

Cyclos Watch Logo

In 1989 the engineer, architect and designer John C. ErmelDue to an order for a new wristwatch design, the idea of ​​making the diversity of the day and night cycle visible through a radially movable hour hand. So that the clock can be read in the usual way, he arranged the hour scale on a so-called "Pascal's worm" - a circular conchoid, a special cycloid that is created by superimposing the usual clockwise rotation with translational movements in the radial direction - in in this case a sinusoidal oscillation with a phase of 24 hours. The associated mechanism for controlling the hour hand has been further developed over 10 years and is a real marvel of Swiss watchmaking. In 1999, Dipl-Ing. John C.

Aero   Both 650
am-pm   Both 650
am-pm dark   Both 650
am-pm PumaCoat   Both 650
Chronometer   Both 650
Curvex   Both 650
Cyclos 24-Hour Dual-Phase ETA 2892 Both 650
day & night Classic dark   Both 650
day & night Transparent   Both 650
day & night TransParity   Both 650
Funfzig   Both 650
TransParity   Both 650
Parity ETA 2892-A2 Both 650


If ever you are unable to find your watch model in this table, here's an easy way to determine the winding requirements for your CYCLOS watches.

  • Select the combined winding mode (CW+CCW) and the minimal number of turns per day (TPD).
  • Place your watch into the winder and check after a few days how accurate your watch shows the time.
  • If it runs behind, it is necessary to increase the number of TPD by one increment.

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