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Patek Philippe · Grand Complications

Strap for Split-Seconds Chronograph 5950 Stainless Steel / Silver

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
Reference5950A-001
FamilyGrand Complications
MovementPatek Philippe caliber CHR 27-525 PS Hours, Minutes, Small Seconds | Chronograph, Column wheel, Rattrapante
CaseStainless Steel

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 5950A-001

Selected for the 20 mm lug width · workshop selection

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The Grand Complications 5950A-001, seen from the bench

The Patek Philippe 5950A-001 Split-Seconds Chronograph is the first perpetual calendar chronograph with split-seconds mechanism crafted entirely in stainless steel, presented as a limited edition in 2009 for the manufacture's 175th anniversary. The 37.00 mm case follows Nautilus aesthetic codes while reinterpreting them with complications rigor. The CHR 27-525 PS calibre features column-wheel movement with split-seconds for interval timing, combining hours, minutes, seconds, 30-minute counter, and 12-hour chronograph scale with perpetual calendar display. The 20 mm lug width is the specific dimension determined by case geometry and proportionality logic.

Frequently asked questions

What is the lug width of the Patek Philippe Grand Complications 5950A-001?

The Patek Philippe 5950A-001 features a 20-millimetre lug width. This dimension is determined by the case geometry and the pins that support the strap. It is essential to verify this measurement before ordering an aftermarket strap to ensure a precise fit without excessive play or forcing.

Which strap material is most suitable for the Patek Philippe 5950A-001?

Alligator leather with vegetable tanning is the historical choice for Grand Complications. However, vegetable-tanned reindeer calf represents a contemporary and durable alternative. For those seeking practicality, a cotton NATO strap or a technical rubber strap offers daily comfort whilst maintaining the sporty identity of the rattrapante chronograph.

How do I change the strap on my Patek Philippe watch?

Changing a strap on a Patek Philippe requires specific tools: a spring-bar removal tool or thin steel implements to lift the lateral pins without damaging the case. If you lack experience, consulting an authorised repairer or specialised strap maker such as those at Casati Milano is advisable to avoid micro-scratching the stainless steel case.

Can I use a compatible aftermarket strap on my Patek Philippe Grand Complications?

Yes, a quality custom-made strap with a 20mm lug width is perfectly compatible. The internal shoulders of the lug must adhere correctly to the case pins. Relying on a qualified strap maker who precisely measures the case and pin positioning ensures an impeccable and reversible fit over time.

How long does a leather strap last on this type of watch?

A well-made alligator or calf leather strap, with vegetable tanning, typically lasts 3-4 years of daily wear, extending to 5-6 years if alternated with other straps. Durability depends on sun exposure, humidity, frequency of wear and tanning quality. Casati Milano offers an 18-month warranty against manufacturing defects but recommends periodic rotation to extend service life.

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