Second Series
Perpetual Calendar 3970 — Second Series
1986–1991
Screw-down solid back (“E”, étanche); sub-dials now match the dial, leaf hands kept, bolder day and month font. Yellow, pink and white gold and platinum. Dated examples: white gold 1989 (movement 875'376), yellow gold 1990 (875'575).
About 650 (Monochrome) or about 450 (Phillips); only two white-gold second series 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 3970
Reference overview →| Variant | Production |
|---|---|
| First Series | 1986 |
| Second SeriesCurrent | 1986–1991 |
| Second Series · Ref. 3970/002 on Integrated Bracelet | Undated |
| Third Series | 1989–1995 |
Case & movement
- Reference
- 3970
- Production
- 1986–1991
- Case serials
- 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.