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Patek Philippe · Grand Complications

Strap for Celestial 5102 Platinum

Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

18mm
18 mm strapsAll Patek Philippe
Lug width18 mm
Case diameter43 mm
Reference5102P-001
FamilyGrand Complications
MovementPatek Philippe caliber 240 LU CL Hours, Minutes | Moonphase, Sky chart
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 5102P-001

Selected for the 18 mm lug width · workshop selection

All 18 mm straps →

The Grand Complications 5102P-001, seen from the bench

The Patek Philippe Grand Complications 5102P-001 Celestial is a platinum astronomical watch with a 43 mm case and 18 mm lug width. It features a manually wound calibre 240 LU CL movement and a rotating sapphire disc displaying northern hemisphere constellations, moon position, and lunar phase synchronized with the actual celestial sphere. The platinum case weighs approximately 165 grams and incorporates hand-guilloché decoration on the inner bezel.

Frequently asked questions

What is the lug width of the Patek Philippe Grand Complications 5102P-001?

The Patek Philippe Grand Complications 5102P-001 features an 18-millimetre lug width (measured hole-to-hole). This dimension is proportioned to the 43 mm case diameter according to Patek Philippe's aesthetic ratio and cannot be modified: any strap must have precisely 18 mm perforation.

Which strap is recommended for the Patek Philippe Grand Complications 5102P-001?

The finest strap for the 5102P-001 is dark alligator (black or dark brown), owing to harmonic contrast with the platinum case and elegant patina development over time. Alternatively, cognac alligator for warmer wardrobe integration, or black rubber for a contemporary practical approach. Vegetable-tanned leather is an ethical choice offering dramatic ageing.

How do I change the strap on the Patek Philippe Grand Complications 5102P-001?

Strap replacement requires extraction of tempered steel pins from the lugs using a dedicated pressing tool (pin vice or equivalent). For the 5102P-001 we recommend entrusting this operation to a qualified watchmaker to avoid scratching the platinum and ensure perfect alignment. Casati Milano can perform installation of your new strap via appointment-based service.

Is there an aftermarket strap compatible with the Patek Philippe Grand Complications 5102P-001?

Yes, with 18 mm lug width. All straps with this specification (alligator, calf, rubber, NATO) are geometrically compatible. At milanostraps.it you will find a selection of artisanal 18 mm leather and rubber straps, plus the option to commission a bespoke piece through Casati Milano in-atelier.

How long does a leather strap last on the Patek Philippe Grand Complications 5102P-001?

Durability depends on use and tanning method. Quality alligator with vegetable tanning, worn daily, offers 5–7 years of aesthetic service before patina and wear necessitate replacement. Occasional wear (formal/dinner) extends life to 10+ years. Casati Milano guarantees 18 months against manufacturing defects and can advise on preventative maintenance intervals.

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