Perpetual Calendar 3971
1986–19902 variants
The 3970 with a sapphire caseback, sold alongside it: snap-on at first, then screw-down (3971E). Feuille hands, stick indexes and contrasting sub-dials. Absorbed into the 3970 when that came with both backs.
Fewer than 300 made.
Variants over time
All recorded years
19851994
198519901995
Faded ends mark approximate or unknown dates. Years are as stated by the cited sources.
Variants
Reference specifications
- Brand
- Patek Philippe
- Model
- Perpetual Calendar
- Reference
- 3971
- Category
- Dress
- Production
- 1986–1990
- Case diameter
- 36 mm
- Date
- Yes
- Movement
- Manual winding