The 5271/11P sits in a prestigious corner of Patek Philippe's catalog where high complications meet gem-setting. It's a perpetual calendar chronograph, one of the most demanding combinations in mechanical watchmaking, wrapped in a 41mm platinum case set with 58 baguette-cut blue sapphires. Another 22 sapphires sit on the folding clasp. The blue dial with a black gradient outer edge gives the watch a depth most calendar dials don't have, and the platinum-and-sapphire combination changes how it reads on the wrist. Here's a closer look at the reference.
The Patek Philippe 5271/11P presented in three-quarter view, showcasing the platinum case and baguette sapphire bezel
Table of Contents
Platinum Case With 58 Baguette Sapphires
The case measures 41mm in diameter, 12.9mm thick, and 49.3mm lug-to-lug. Total weight comes in at 135 grams, which gives it a solid presence on the wrist without crossing into bulky territory. The bezel and lugs carry 58 baguette-cut blue sapphires totaling approximately 4.11 carats, and the folding clasp adds another 22 baguette sapphires, bringing the total gem-setting to about 5.16 carats.
As with every platinum Patek Philippe, there's a small diamond set into the case side at 6 o'clock. It's the brand's quiet signal that the metal is platinum, and on this reference it sits next to the sapphires rather than getting lost in them.
Bezel detail revealing the precise alignment of baguette-cut blue sapphires across the case
Lug-set sapphires continuing from the bezel, alongside the platinum-marker diamond at 6 o'clock
Reading the Blue-and-Black Dial
The dial is blue with a black gradient that deepens toward the outer edge, finished with applied white gold hour markers and dauphine hands. Even with a perpetual calendar and chronograph layout, everything stays legible.
At 12 o'clock, a double aperture displays the day of the week and the month. At 9 o'clock, you have the running seconds. At 3 o'clock, the 30-minute chronograph counter. The lower half of the dial carries a pointer-date hand sweeping around the moon phase scale, with the moon phase itself at 6 o'clock. Two small round apertures at 4:30 and 7:30 handle the leap-year indicator and day/night indicator, both of which help when setting a perpetual calendar correctly.
Full dial view highlighting the blue-to-black gradient and white gold dauphine hands
Each complication highlighted in turn: running seconds, chronograph counter, pointer date, moon phase, leap year, and day/night indicator
Caliber CH 29-535 PSQ
Inside is the Patek Philippe CH 29-535 PSQ, a manually wound mechanical caliber that combines a traditional column-wheel chronograph with a perpetual calendar. Power reserve runs approximately 55 to 65 hours.
The CH 29-535 family is what Patek built when they moved away from the older Lemania-based chronograph platform, and the PSQ designation marks the perpetual variant of the caliber. Finishing is to Patek Philippe's standard, which is what you'd expect at this level.
The CH 29-535 PSQ shown through the open caseback and through the sapphire crystal
Strap and Sapphire-Set Clasp
The 5271/11P comes on a black alligator strap with blue stitching. The blue thread picks up the dial and the gem-setting, and the choice of black leather instead of a more traditional dark blue strap pulls the watch slightly away from the standard "dress chronograph in a tux" look. The folding clasp is set with 22 baguette-cut blue sapphires that match the bezel and the dial.
Black alligator strap with blue contrast stitching
The folding clasp set with baguette sapphires, shown closed and articulated
On the Wrist
At 41mm wide and 12.9mm thick, the 5271/11P wears closer to a modern Calatrava-style chronograph than to a chunky grand complication. The 135-gram weight feels substantial without being heavy. The sapphires sit flush enough that the watch reads as a balanced piece rather than a gem-set party trick, and the gradient dial adds visual depth that a flat blue dial wouldn't have.
The 5271/11P presented on the wrist showing balanced 41mm proportions
Off-wrist on a watch pillow, and weighed at 135 grams on a digital scale
A Watch That Doesn't Sit in One Category
Patek Philippe's grand complications usually slot neatly: the 5270 covers the perpetual chronograph at the classical end, the 5236P handles the in-line perpetual, the 5320G plays the vintage-styled card. The 5271/11P doesn't have a clean shelf. The mechanics are pure perpetual calendar chronograph, but the gem work pushes it sideways out of the strict high-watchmaking-purist lane.
We think it's one of the more interesting references Patek Philippe is building right now, and the 5271/11P sits at the gem-setting end of that approach.
The 5271/11P presented in its Patek Philippe box
Specifications at a Glance
| Specification | Detail |
|---|---|
| Reference | 5271/11P-010 |
| Collection | Grand Complications |
| MSRP (Retail) | $387,472 |
| Watches Off 5th Price | Price on Request |
| Case Material | Platinum |
| Case Diameter | 41mm |
| Case Thickness | 12.9mm |
| Lug-to-Lug | 49.3mm |
| Weight | ~135g |
| Movement | Patek Philippe caliber CH 29-535 PSQ, manual wind |
| Power Reserve | ~55–65 hours |
| Complications | Perpetual calendar, column-wheel chronograph, moon phase |
| Gem-Setting | 58 baguette sapphires on case (~4.11 ct) + 22 on clasp; ~5.16 ct total |
| Dial | Blue with black gradient, white gold hour markers, dauphine hands |
| Strap | Black alligator with blue stitching, sapphire-set folding clasp |
Frequently Asked Questions
How much does the Patek Philippe 5271/11P cost?
The full reference is 5271/11P-010 (Grand Complications collection, blue dial with black alligator strap). MSRP at Patek Philippe is $387,472. Watches Off 5th lists it on a price-on-request basis. Reach out to us for current market pricing.
How many sapphires are set on the 5271/11P?
Eighty in total: 58 baguette-cut blue sapphires across the bezel and lugs (approximately 4.11 carats) and 22 baguette sapphires on the folding clasp. Combined gem-setting weight is around 5.16 carats.
What movement powers the 5271/11P?
The Patek Philippe caliber CH 29-535 PSQ, a manually wound chronograph movement built around a column wheel and combined with a perpetual calendar. Power reserve runs approximately 55 to 65 hours when fully wound.
What does the small diamond at 6 o'clock indicate?
It's Patek Philippe's signature for platinum cases. Every platinum Patek Philippe carries a small diamond set into the case side at 6 o'clock as a discreet identifier of the metal.
Interested in This 5271/11P?
If you're interested in this Patek Philippe 5271/11P or another high complication reference, reach out to us at watchesoff5th.com or on Instagram at @watchesoff5th. We'd be happy to help.