Fourth Series
Perpetual Calendar 3970 — Fourth Series
1994–2004
Like the third series but delivered on a folding clasp in the case metal instead of a pin buckle; told apart by case and movement numbers (movements from about 3'045'000). Dated examples: 2000 pink gold (3970ER-012, -016), c. 2004 platinum (3970EP-021).
About 2,000 (Monochrome).
No verified image of this watch yet
Identifying details
- Perpetual calendar
Calendar that accounts for month lengths and leap years.
- Moon phase
Variants of 3970
Reference overview →| Variant | Production |
|---|---|
| First Series | 1986 |
| Second Series | 1986–1991 |
| Second Series · Ref. 3970/002 on Integrated Bracelet | Undated |
| Third Series | 1989–1995 |
Case & movement
- Reference
- 3970
- Production
- 1994–2004
- Case diameter
- 36 mm
- Movement
- Manual winding
- Date
- Yes
- Caliber
- Patek Philippe CH 27-70 Q
Dial, bezel & hands
Unknown attributes are left out rather than guessed.
Movement
Patek Philippe CH 27-70 Q
Heavily modified Lemania 2310 column-wheel chronograph with perpetual calendar, moon phase, leap-year and 24-hour indications. Replaced the Valjoux-based in the ref. 3970 and also powered the ref. 5020.