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Patek Philippe · Grand Complications

Strap for Celestial 5106 Only Watch 2009

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 diameter43 mm
Reference5106R-001
FamilyGrand Complications
MovementPatek Philippe caliber 240 LU CL C Hours, Minutes | Date | Moonphase, Sky chart
CasePink 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 Grand Complications 5106R-001

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Grand Complications 5106R-001, seen from the bench

The Patek Philippe Grand Complications reference 5106R-001 features the caliber 240 LU CL C with indication of hours, minutes, date, moon phases and sky chart. The ultra-thin movement offers astronomical complications through a display system of the night sky. The watch integrates perpetual calendar functions with a graphical representation of the night firmament.

Frequently asked questions

What is the lug width of the Patek Philippe Grand Complications 5106R-001?

The lug width of the Patek Philippe 5106R-001 is 20 mm. This is the internal distance between the two metal lugs on the case where the strap is inserted. You can verify this easily with a digital calliper or by consulting the watch's certificate of authenticity, where this specification is always clearly stated.

Which strap do you recommend for the Patek Philippe Grand Complications 5106R-001?

For the 5106R-001 we recommend alligator in black or anthracite, which enhances the warmth of rose gold without competing visually with the dial. Noble alternatives include shell cordovan in cognac (creating an extraordinary chromatic harmony) and vegetable-tanned calf leather in medium brown, versatile in any context. For those seeking a contemporary sporty option, cotton-nylon NATO offers lightness and practicality.

How do I change the strap on my Patek Philippe 5106R-001?

Strap replacement is carried out via the side lugs of the case. Using a spring bar tool, compress the springs of the two pins passing through the lugs, releasing the old strap. Position the new strap (always 20 mm in width) and reinsert the pins by compressing the springs again. If you are not experienced, we recommend consulting an expert or Casati Milano, which offers the service in-house or can provide step-by-step instructions via WhatsApp.

Can I use a compatible aftermarket strap on my 5106R-001?

Absolutely. A quality artisanal strap compatible with the 20 mm lug width is perfectly suitable for the 5106R-001. The important thing is that it respects the precise dimensions and is made from premium leather (alligator, cordovan, calf) or noble materials. Artisanal straps from Casati Milano come with an 18-month warranty on manufacturing defects and allow you to personalise your watch while maintaining its structural integrity.

How long does a leather strap last on a watch like the 5106R-001?

Durability depends on the leather and usage. Quality alligator with proper tanning lasts approximately 3-5 years with moderate daily wear. Shell cordovan, being more robust, can exceed 5-7 years. Calf leather varies between 2-4 years. Natural patina is a sign of living leather, not deterioration. With periodic maintenance (water-repellent protection, gentle cleaning) and proper storage during inactive months, the strap maintains aesthetics and functionality well beyond these estimates.

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