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Patek Philippe · Grand Complications

Strap for Split-Seconds Chronograph 5370 Platinum / Black

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 diameter41 mm
Reference5370P-001
FamilyGrand Complications
MovementPatek Philippe caliber CHR 29-535 PS hours, minutes, small seconds, day / Night Indication | Chronograph, column wheel, Rattrapante
Year2015 - 2020
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 5370P-001

Selected for the 20 mm lug width · workshop selection

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The Grand Complications 5370P-001, seen from the bench

The Patek Philippe Grand Complications 5370P-001 Split-Seconds Chronograph features a 41.00mm platinum case with a 20mm lug width. Powered by the CHR 29-535 PS caliber with 404 components, this chronograph launched in 2019 combines classical design with modern tolerances. The split-seconds complication allows intermediate time capture without interrupting main chronometry, a rare construction technique rooted in the manufacture's 1884 patent.

Frequently asked questions

What is the lug width of the Patek Philippe Grand Complications 5370P-001?

The 5370P-001 features a lug width of 20mm. This measurement should be verified using a calliper placed between the inner edges of the two lugs. A compatible strap must fit exactly this dimension to prevent play or unwanted stress on the watch.

What is the best strap for the Patek Philippe Grand Complications 5370P-001?

For a platinum 5370P-001, alligator or shell cordovan offer the finest aesthetic and tactile balance. Alligator with geometric grain amplifies the sobriety of the case, whilst shell cordovan develops a patina over time that dialogues with the platinum's natural ageing. The choice depends on intended use and desired chromatic contrast.

How do you change the strap on a Patek Philippe Grand Complications 5370P-001?

Strap replacement requires extraction of the spring bars through an internal spring mechanism. We recommend entrusting this to an official Patek Philippe service centre or certified artisans such as Casati Milano, who possess specialist tools to prevent scratches on the platinum case.

Are there compatible aftermarket straps for the Patek Philippe Grand Complications 5370P-001?

Yes. milanostraps.it catalogues a dedicated collection of 20mm-width straps compatible with this model. All straps in this category have been verified for geometric compatibility and are available in multiple materials: alligator, calf leather, shell cordovan, NATO and FKM rubber.

What is the expected lifespan of a leather strap on the Patek Philippe Grand Complications 5370P-001?

A high-quality leather strap (alligator, shell cordovan or calf) has an average lifespan of 3-5 years with moderate daily use. Factors such as humidity, sun exposure and frequency of wear influence longevity. Casati Milano offers an 18-month warranty against manufacturing defects, with subsequent maintenance interventions available.

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