Additional information
| Brand: | Patek Philippe |
|---|---|
| Family: | Grand Complications |
| Reference: | 3971J-001 |
| Name: | Perpetual Calendar Chronograph 3971 |
| Produced: | 1989 - 1989 |
| Limited: | No |
Case
| Material: | Yellow gold |
|---|---|
| Glass: | Sapphire |
| Back: | Open |
| Shape: | Round |
| Diameter: | 36.00 mm |
Dial
| Color: | Gold |
|---|---|
| Indexes: | Arabic Numerals |
| Hands: | Breguet |
Description
The Patek Philippe reference 3971 is a rare variation of the 3970, exclusively fitted with a glazed screw back. Most were fitted with a silver dial. The pictured example however, a 1989 model later to appear in a Christie's auction, features a rare gilt dial.
Movement
Based on a Nouvelle Lemania ebauche, the CH 27-70 Q powered the iconic references 3970 and 5970. With added rattrapante function (CHR 27-70 Q) it also served in the much-coveted 5004. It was the last of the Patek Philippe Perpetual Calendar Chronograph movements not to be fully in-house.
| Type: | Handwound |
|---|---|
| Brand: | Patek Philippe |
| Caliber: | CH 27-70 Q |
| Base: | Lemania2310 |
| Display: | Analog |
| Diameter: | 30.00 mm |
| Jewels: | 24 |
| Reserve: | 60 h |
| Frequency: | 18000 bph |
| Time: | Hours, Minutes, Small Seconds, Day / Night Indication |
| Date: | Date, Day, Leap Year, Month, Perpetual Calendar |
| Chronograph: | Chronograph, Column wheel |
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