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Patek Philippe · Grand Complications

Strap for Celestial 6104 White Gold / Blue

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 diameter44 mm
Reference6104G-001
FamilyGrand Complications
MovementPatek Philippe caliber 240 LU CL C Hours, Minutes | Date | Moonphase, Sky chart
CaseWhite 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 6104G-001

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Grand Complications 6104G-001, seen from the bench

The Patek Philippe Grand Complications ref. 6104G-001 Celestial features a 44.00 mm white gold 950 case with the caliber 240 LU CL C movement. This model displays hours, minutes, date, moon phase, and a rotating celestial map showing the night sky as visible from Geneva. The 20 mm lug width accommodates standard international strap specifications, providing compatibility with certified aftermarket straps without construction compromises.

Frequently asked questions

What is the lug width of the Patek Philippe Grand Complications 6104G-001?

The lug width of the 6104G-001 is 20 millimetres. This measurement refers to the distance between the lugs at the point where the strap attaches to the case. It is an international standard that facilitates the search for quality aftermarket straps compatible with the model.

What is the best strap for the Patek Philippe 6104G-001?

The best strap depends on usage and personal preference. For formal occasions, we recommend slate blue or black alligator, which enhance the contrast with the starry night dial. Calf leather with vegetable tanning develops a patina over time, creating a historical relationship between watch and wrist. For more versatile contexts, rubber ensures ergonomic comfort without sacrificing elegance.

How do I change the strap on the Patek Philippe Grand Complications 6104G-001?

The strap is replaced using a spring bar removal tool. Position the tool in the lateral slot of the lug, apply gentle pressure to release the internal spring, then carefully extract it. Insert the new strap by following the reverse procedure. If uncertain, entrust the task to a specialist watchmaker.

Can I use an aftermarket strap compatible with the Patek Philippe 6104G-001?

Absolutely. An aftermarket strap built to the 20mm standard is perfectly compatible. Construction quality is decisive: we recommend premium leathers with vegetable tanning or alligator from specialist suppliers, equipped with a white gold deployante buckle to preserve the material coherence of the case.

How long does a leather strap last on the 6104G-001?

The lifespan of a leather strap depends on intensity of use, care, and material quality. A premium alligator or calf with vegetable tanning and artisanal finishing maintains structural integrity for 5-7 years in daily use. Prolonged exposure to sunlight, sweat and humidity accelerates ageing. A rubber strap, conversely, resists for 3-4 years before showing elastic failure. Rotating between straps extends the lifespan of each.

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