Strap for Perpetual Calendar 5160 White Gold / Silver

The lug width of the Patek Philippe Grand Complications 5160/500G-001 is 18 mm. This measurement represents the ideal proportional ratio between the 38 mm case and the wrist, ensuring both aesthetic balance and wearing comfort. To measure accurately, use a digital calliper from the centre of the upper attachment to the centre of the lower attachment on the case.

For this white gold case measuring 38 mm, alligator is the canonical choice: its characteristic grain and natural patina create a compelling dialogue with the neutral tones of the metal. Shell cordovan with vegetable tanning offers uniqueness and depth of patina over time. Calf leather, in smooth or semi-grained finish, guarantees everyday elegance and easy replacement. Your choice depends on the context: formal, daily, or alternative wear.

Changing the strap requires a specific spring bar tool and a stable work surface. Position the watch with the lugs facing upward, gently insert the spring bar tool under the elastic pin, lift and simultaneously push the strap towards the watch case body to release the lug. Repeat on the other lug. Install the new strap by reversing the procedure. If you are not experienced, entrust the task to an authorised watchmaker or our Casati Milano atelier.

Yes, any strap with an 18 mm lug width is compatible with the lugs of the 5160/500G-001. However, to preserve the value and aesthetic integrity of a white gold perpetual calendar, we recommend choosing straps made from noble materials (alligator, cordovan, quality calf) with finishes coherent with the dignity of the case. Avoid low-quality straps that could scratch the gold lugs.

The lifespan of a leather strap depends on the material, tanning method and frequency of use. Alligator with vegetable tanning typically lasts 4–6 years with daily wear, shell cordovan 8–10 years thanks to its natural hardness, and classic calf 3–4 years. Ageing, especially in humid climates or with frequent water contact, accelerates deterioration. Casati Milano guarantees 18 months against manufacturing defects and offers reconditioning services by appointment.