Fourth Series
Perpetual Calendar 3940 — Fourth Series
c. 1995–2007
“Sigma Swiss sigma” moves into line with the beaded minute track; modern sans-serif sub-dial font; hallmarks only on the backs of the lugs. Some white-gold and platinum examples have a silver moon and stars.
Collectors divide production into series; the first 25 were numbered dials for Beyer. Hallmarks move from the case side to the lugs as production advances.
No verified image of this watch yet
Identifying details
- Perpetual calendar
Calendar that accounts for month lengths and leap years.
- Moon phase
Variants of 3940
Reference overview →| Variant | Production |
|---|---|
| Beyer Numbered Edition | 1985 |
| First Series | 1985–c. 1988 |
| First Series · Gold (Doré) Dial | Undated |
| Second Series | 1988–c. 1990 |
Case & movement
- Reference
- 3940
- Production
- c. 1995–2007
- 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.