Display Back
Perpetual Calendar 3941 — Display Back
Undated
Identical to the contemporary 3940 except for the glazed caseback.
About 35 known.
No verified image of this watch yet
Identifying details
- Perpetual calendar
Calendar that accounts for month lengths and leap years.
- Moon phase
Variants of 3941
Reference overview →| Variant | Production |
|---|---|
| Display BackCurrent | Undated |
| Display Back · Beyer Dial | Undated |
Case & movement
- Reference
- 3941
- Production
- Undated
- Case diameter
- 36 mm
- Movement
- Automatic
- Date
- Yes
- Caliber
- Patek Philippe 240 Q
Dial, bezel & hands
Unknown attributes are left out rather than guessed.
Movement
Patek Philippe 240 Q
Ultra-thin micro-rotor cal. 240 (1977) with a perpetual calendar module, introduced in the ref. 3940; one of the smallest and thinnest movements of its day. 22-carat gold micro-rotor.