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Patek Philippe · Grand Complications

Strap for Perpetual Calendar Split-Seconds Chronograph 5951/500P

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

20mm
20 mm strapsAll Patek Philippe
Lug width20 mm
Case diameter37 mm
Reference5951/500P-001
FamilyGrand Complications
MovementPatek Philippe caliber CHR 27-525 PS Q Hours, Minutes, Small Seconds, Day / Night Indication | Date, Day, Leap Year, Month, Perpetual Calendar | Chronograph, Column wheel, Rattrapante, Monopoussoir | Moonphase
CasePlatinum

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

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Straps for the Grand Complications 5951/500P-001

Selected for the 20 mm lug width · workshop selection

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The Grand Complications 5951/500P-001, seen from the bench

The Patek Philippe Grand Complications 5951/500P-001 is a 37mm platinum case watch combining a perpetual calendar with a single-button chronograph split-seconds mechanism. The CHR 27-525 PS Q caliber features hours, minutes, small seconds, a mechanical perpetual calendar requiring no correction until 2100, split-seconds chronograph, and moonphase with day/night indicator. The 20mm lug width accommodates the strap and maintains visual balance on the wrist.

Frequently asked questions

What is the lug width of the Patek Philippe Grand Complications 5951/500P-001?

The Patek Philippe Grand Complications 5951/500P-001 features a 20mm lug width, measured centre-to-centre between the lugs. This dimension is standard for the model and ensures optimal proportions relative to the 37mm case diameter.

Which strap material is best suited for the Patek Philippe Grand Complications 5951/500P-001?

Alligator leather remains the material of choice for this timepiece: it delivers formal elegance, decade-long durability, and a patina that evolves naturally over time. Alternative options of equal merit include vegetable-tanned calf leather (for more rapid chromatic development) and shell cordovan (for a compact texture and natural sheen).

How do I change the strap on a Patek Philippe Grand Complications 5951/500P-001?

Strap replacement on this model requires extreme care: use a specialised spring bar tool, inserting the tip into the lateral slot of the lug. Extract the pins with a motion parallel to the dial. Patek Philippe recommends entrusting this operation to an authorised service centre to preserve the integrity of the 950 platinum case.

Can I use an aftermarket strap compatible with this model?

Yes, provided it is certified for 20mm lug width. Artisanal straps of superior quality (such as those by Casati Milano) ensure not only geometric compatibility, but also aesthetic coherence with the constructive excellence of a Patek Philippe Grand Complications.

What is the typical lifespan of a leather strap on a Patek Philippe?

The lifespan of a quality leather strap (certified alligator, vegetable-tanned calf, shell cordovan) ranges between 8 and 15 years, depending on intensity of use and climatic conditions. A superior leather develops desirable patina during this period. Rubber or technical fabric straps guarantee extended durability (15-20 years) with minimal maintenance.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only