Movement record · Switzerland
Patek Philippe 12-600 AT
Partially verifiedAutomatic calibre with a heavy central rotor
Technical specifications
- Diameter
- Approx. 27.5 mm
- Height
- Not recorded in the sources consulted
- Jewels
- 30 (sources vary)
- Frequency
- 19,800 vph
- Power reserve
- Approx. 40 hours
- Winding
- Automatic with manual winding
- Setting
- Pendant set
- Escapement
- Swiss lever
- Balance
- Free-sprung Gyromax-type balance
- Complications
- Centre seconds
Identification features
- Large gold rotor and free-sprung balance
- Archive extract is the reliable route to confirming a specific example
Known variants
- Later 27-460 generation
Servicing notes
Cleaning, lubrication, mainspring and pivot work belong with a qualified watchmaker working from calibre-specific documentation. Conserve original parts: replacing a worn component with a modern substitute changes the object, and refinishing plates or dials destroys evidence.
General guidance only. Antique movements should be serviced by a qualified watchmaker.
Historical significance
The house's first series automatic calibre, notable for combining a free-sprung balance with full-rotor automatic winding.
Related photographs
No confidently matched photograph of this subject has been found yet. These photographs show a closely related record, and are not examples of the type described on this page.
Sources & references
- de Carle, D., Watch and Clock Encyclopedia
- Period trade material catalogues and calibre reference compilations (edition-dependent)
- Published manufacturer technical documentation where available
Where sources disagree, the disagreement is stated rather than resolved silently.