Patek Philippe Split Seconds Chronograph 5370P
Record status
Individual type · partial
Period
2015
Maker / issuer
Patek PhilippeThe Patek Philippe reference 5370P is a platinum-cased split-seconds chronograph wristwatch featuring a blue Grand Feu enamel dial. Introduced in 2015, this model marks the brand's first fully in-house developed split-seconds chronograph movement, identified as the caliber CHR 29-535 PS.
The mechanical architecture incorporates six patented technical innovations intended to optimize gear engagement and balance amplitude. The timepiece was developed under the oversight of Thierry Stern, with engineering led by Philip Barat and aesthetic design managed by Sandrine Stern. The case back is transparent, exposing the hand-finished movement components. The exact dimensions of the platinum case are not provided in the documentation, and there is no information regarding original accompanying accessories.
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
- Dial
- Grand Feu Enamel
- Type
- Split seconds chronograph
- Maker
- Patek Philippe
- Movement
- CHR 29-535 PS
- Case material
- Platinum
- Movement type
- In-house
- Place recorded
- Switzerland
- Introduction year
- 2015
- Technical patents
- 6
- Maker / attribution
- Patek Philippe
Design
- Case and Dial
- The reference 5370P features a case constructed from platinum, consistent with the brand's naming convention for this metal. The dial is executed in blue Grand Feu enamel, characterized by applied numerals and sub-dials. The arrangement includes two main sub-dials for the chronograph functions. The case design includes a three-button configuration to manage the split-seconds chronograph complications. The dial layout includes a tachymeter scale printed on the outer periphery. The visual presentation of the case and dial is described as classical in nature.
- Visible features
- • Blue Grand Feu enamel dial with applied Arabic numerals • Exposed chronograph movement components through a transparent case back • Three-button chronograph pusher configuration
- Movement and Engineering
- The movement powering the 5370P is the hand-wound caliber CHR 29-535 PS, which is an in-house development. This engine includes a re-engineered split-seconds mechanism, which is intended to provide smoother gear engagement and increased stability of balance amplitude compared to predecessor movements. The movement construction incorporates six distinct patented technical innovations specifically for the chronograph system. The manual finishing of the movement is visible through the exhibition case back, allowing observation of the complex mechanical parts.
- Development and Attribution
- The development of the 5370P was a structured project within Patek Philippe, involving key leadership. Thierry Stern oversaw the initiative, while Philip Barat directed the engineering and technical development of the caliber. Sandrine Stern was responsible for the aesthetic design of the watch. The watch is presented as an example of contemporary complications produced in Geneva. No specific provenance or historical ownership data is available in the provided source.
Identification
- Reference
- 5370P
- 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: Service history and functional status are not recorded
- Research required: Original packaging, documentation, or accompanying accessories are not verified