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Patek Philippe · Complications

Strap for Annual Calendar 5146 Rose Gold / Cream

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 diameter39 mm
Reference5146R-001
FamilyComplications
MovementPatek Philippe caliber 324 S IRM QA LU Hours, Minutes, Seconds | Date, Annual Calendar, Day, Month | Moonphase | Power Reserve Indicator
CaseRose Gold

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 Complications 5146R-001

Selected for the 20 mm lug width · workshop selection

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The Complications 5146R-001, seen from the bench

The Patek Philippe 5146R-001 Annual Calendar is a 39mm rose gold case watch featuring the in-house calibre 324 S IRM QA LU automatic movement. This timepiece integrates eight functions including hours, minutes, seconds, date, complete annual calendar (day and month), moonphase indicator and power reserve on a 29mm movement diameter. The case thickness measures 10.76mm with a transparent sapphire caseback. The 20mm lug width is standard for this Complications collection model.

Frequently asked questions

What is the lug width of the Patek Philippe Complications 5146R-001?

The lug width of the 5146R-001 is exactly 20 millimetres. This measurement is standard for Patek Philippe 39mm cases in the Complications collection and is compatible with a wide range of bespoke leather straps.

What is the best strap for the Patek Philippe 5146R-001?

Alligator remains the canonical choice for Complications in rose gold. The natural grain and structural resistance of the leather mirror the austerity of the annual calendar dial. For refined alternatives, shell cordovan offers deep patina development, whilst vegetable-tanned calf develops consistent texture over time.

How do I change the strap on a Patek Philippe 5146R-001?

Removing the strap from the 5146R-001 requires a dedicated spring bar tool to release the elastic pins at the ends of the lugs. This is a delicate operation best entrusted to a professional watchmaker to avoid damage to the rose gold case.

Can I mount an aftermarket strap on my 5146R-001?

Yes, it is fully compatible with 20mm aftermarket straps. We recommend selecting brands specialising in artisanal leatherwork using premium hides (alligator, cordovan, calf) to maintain the quality standard of the Patek Philippe.

How long does a leather strap last on a Patek Philippe?

A premium quality leather strap lasts approximately 3-5 years with daily wear, provided regular maintenance (cleaning and drying after moisture exposure). Alligator tends to last longer than calf. Casati Milano offers 18 months warranty on manufacturing defects.

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