Patek Philippe 3970EP Perpetual Calendar Chronograph
Record status
Individual type · partial
Period
circa 1980s
Maker / issuer
Patek PhilippeThis Patek Philippe wristwatch is a second-series example of the reference 3970, a model introduced in 1986 as the successor to the reference 2499. This specific watch features a 36mm platinum (PT 950) case manufactured by Ateliers Réunis.
It is distinguished by the presence of a 'Big Hallmark' stamp. The watch is powered by the manual-wind caliber CH 27-70 Q, which is based on a Lemania ébauche. The argenté (warm silver) dial includes feuille-style hands and incorporates displays for a chronograph, a perpetual calendar, and moon phases, with the calendar indications presented in Italian. According to the provided information, the watch is one of only eleven examples produced in the second series with a platinum case, and it is documented as one of only two of these eleven to feature an Italian-language calendar.
The condition is reported as untouched and unrestored.
Evidence at a glance
- Linked sources
- 1
- Photograph views
- 1
- Catalogue references
- 0
Counts describe this entry’s documentation, not authenticity, rarity or completeness. Photographs may show one specimen; check each caption and licence.
Technical characteristics
- Type
- Perpetual calendar chronograph
- Maker
- Patek Philippe
- Movement
- CH 27-70 Q (Lemania based)
- Reference
- 3970EP
- Case Diameter
- 36 mm
- Case Material
- Platinum (PT 950)
- Caliber Origin
- Lemania ébauche
- Place recorded
- Switzerland
- Production Rarity
- One of eleven platinum examples in the second series
- Production Series
- Second Series
- Maker / attribution
- Patek Philippe
Design
- Visible features
- • Italian language day and month indicators in apertures • Feuille-style hands present on the dial • Three-register chronograph layout integrated with moon phase • Platinum case construction with pusher configuration for calendar adjustment
- Design and Construction
- The reference 3970 was launched in 1986, succeeding the reference 2499 in the Patek Philippe lineup. This second-series wristwatch features a 36mm case crafted from platinum. The case production is attributed to the workshop Ateliers Réunis. The dial is colored in an argenté, or warm silver, tone and is set with feuille-shaped hands. The layout organizes the chronograph, perpetual calendar, and moon phase complications within the 36mm diameter.
- Condition and Attribution
- The auction description reports that both the case and the dial are in an untouched, unrestored, and preserved condition. The documentation does not provide details regarding recent servicing or the inclusion of original accessories. The information provided is derived from the source description. No independent assessment of the authenticity of components or the operational performance of the movement has been conducted.
- Movement and Functionality
- The mechanical movement powering this watch is the Patek Philippe caliber CH 27-70 Q. The caliber supports multiple functions including a chronograph, a perpetual calendar, and a moon phase indicator. These complications are designed to fit within the constraints of the 36mm case, maintaining a balance between technical density and readability.
Identification
- Reference
- 3970EP
- Source note
- Facts transcribed from the linked source listing or collection record. Attribution and specifications are source-reported and have not been independently authenticated.
Catalogue references
No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.
Research required
- Research required: Unverified independent authentication of parts or movement performance
- Research required: Limited information provided regarding current service history or included accessories