Strap for Perpetual Calendar 5940G White Gold / Black

The lug width of the Patek Philippe Grand Complications 5940G-010 is 20 millimetres. This measurement is precise and standard across all examples of the model, regardless of production year. Lug width is measured from the interior of one lug to the other, using a digital calliper positioned perpendicularly to the case attachment lugs.

For a timepiece of this significance, alligator leather remains the traditional choice, particularly in dark shades that pair naturally with the white gold case. Alternatively, shell cordovan offers its own lustre and develops patina over time, whilst vegetable-tanned calf leather provides a minimalist texture. The choice depends on wearing style: formal environments suit alligator; versatile daily wear suggests calf leather.

Changing the strap on a Patek Philippe requires specific tools: a quality watchmaking spring bar removal tool and a stable work surface. Insert the tool gently into the aperture beneath the lug, compress the internal spring, and remove the pin. Repeat on both sides. We recommend entrusting this operation to a certified watchmaker or Casati Milano to ensure precision and safety.

Yes, the 5940G-010 is compatible with quality aftermarket straps, provided they respect the 20-millimetre lug width. We recommend choosing suppliers specialised in fine leathers and artisanal construction, such as Casati Milano, which guarantee construction quality and materials compatible with the dignity of the timepiece.

A quality leather strap, produced with vegetable tanning or alligator, typically lasts 5-7 years of regular wear. Lifespan depends on intensity of use, climatic conditions, maintenance, and leather type. Vegetable-tanned leather tends to resist longer than chrome-tanned leather. Occasional conditioning with leather-specific creams extends the strap's useful life.