Patek Philippe Ref. 5951P Platinum Perpetual Calendar Chronograph Listed at Bonhams Auction
A Rare Patek Philippe Perpetual Calendar Chronograph Emerges on the Auction Market
A remarkable example of haute horlogerie has surfaced on the auction circuit. Bonhams is presenting a Patek Philippe Reference 5951P-001, a platinum perpetual calendar chronograph wristwatch with moon phase indication. This particular timepiece was originally purchased on September 16, 2012, and represents one of the most complicated and sought-after models from the venerable Genevan manufacture.
Technical Specifications and Movement
The Ref. 5951P-001 is powered by the Caliber CHR 27-525 PS Q, a 27-jewel manual-wind movement adjusted to heat, cold, isochronism, and five positions. This caliber represents Patek Philippe's mastery of combining multiple complications within a single movement architecture, integrating perpetual calendar, chronograph, and moon phase functions.
| Specification | Detail |
|---|---|
| Reference | 5951P-001 |
| Case Material | Platinum, cushion form |
| Case Size | 36mm |
| Movement | Cal.CHR 27-525 PS Q, 27-jewel manual wind |
| Complications | Perpetual calendar, split-seconds chronograph, moon phase |
| Dial | Black with applied polished baton hour markers |
| Subsidiary Dials | Silvered engine-turned at 3, 6, and 9 o'clock |
| Strap | Black Patek Philippe alligator leather with red stitching |
| Buckle | Signed platinum |
| Original Purchase Date | September 16, 2012 |
Dial Layout and Case Design
The black dial features applied polished baton hour markers and an outer minute and 1/5th second divisions track. Three engine-turned silvered subsidiary dials are positioned at 3, 6, and 9 o'clock, displaying seconds, minute recording, and date respectively. Offset day and month apertures provide the perpetual calendar displays, while a moon phase indication sits at 12 o'clock. Additional apertures at 4 and 8 o'clock indicate day/night and leap year status.
The polished cushion-form case is fitted with a snap-on exhibition back, allowing visibility of the movement. The start/stop/reset functions are integrated within the crown, with a split-second button positioned at 2 o'clock. A diamond is set in the case band at 6 o'clock, adding a subtle touch of luxury to the otherwise understated platinum case.
Accompaniments and Provenance
The watch comes with comprehensive documentation and accessories, including the original Patek Philippe box, outer card, Certificate of Origin, Patek Philippe leather booklet with accompanying literature, delivery box, quick set pin, swing tag, and a spare platinum case back. These accompanying materials significantly enhance the collectibility and provenance of the timepiece.
The Patek Philippe 5951 in Context
The Reference 5951 belongs to Patek Philippe's family of grand complication wristwatches, combining the perpetual calendar with a split-seconds chronograph. The perpetual calendar mechanism automatically accounts for months of varying lengths and leap years, requiring no manual correction until 2100. The split-seconds chronograph (rattrapante) allows for timing of intermediate events, a complication prized by collectors for its mechanical complexity.
For those interested in understanding movement complications and their functions, our movement guide provides accessible explanations of various caliber types and their respective features.
Frequently Asked Questions
What is a perpetual calendar complication?
A perpetual calendar automatically displays the correct date, day, month, and leap year cycle without manual adjustment. It accounts for months with 28, 30, and 31 days, requiring correction only once in the year 2100 when the Gregorian calendar's leap year rules create a discrepancy.
What is a split-seconds chronograph?
A split-seconds chronograph, also known as a rattrapante, features an additional central seconds hand that can be stopped independently while the main chronograph hand continues running. This allows the wearer to time two simultaneous events or record intermediate lap times.
Why is the platinum case significant?
Platinum is among the rarest and most precious metals used in watchmaking. Its density, weight, and resistance to tarnish make it a preferred material for the most exclusive timepieces. Patek Philippe designates its platinum-cased watches with a small diamond set into the case band, a discreet hallmark of the metal's prestige.
Auction Details
This Patek Philippe Ref. 5951P-001 is being offered through Bonhams, with lot details and bidding information available on their auction platform. Collectors and enthusiasts interested in acquiring this exceptional perpetual calendar chronograph may visit the official listing for current pricing and auction timeline.
According to www.bonhams.com
For more information on watch care and maintenance, including water resistance considerations, explore our comprehensive guides section.