Patek Philippe
Complications 5131R-001— lug 20mm

The lug width of the Patek Philippe Complications ref. 5131R-001 is 20 millimetres. This measurement is critical for selecting a compatible strap. The measurement should be taken from the inner base of one lug to the inner base of the opposite lug, ensuring the strap inserts perfectly without play or constraint.

For the Patek Philippe Complications 5131R-001, noble and durable leathers are recommended. Vegetable-tanned alligator in mahogany or dark chestnut tones offers the finest aesthetic harmony with the rose gold case and cloisonné enamel dial. Alternatively, shell cordovan in bordeaux or vegetable-tanned calf leather allow for natural patina development over time, in keeping with the watch's evolution.

The strap on the Patek Philippe Complications 5131R-001 is changed using a spring bar tool to remove the lugs that secure the strap to the case pins. It is advisable to consult a professional to avoid damage to the rose gold case. At our Casati Milano atelier, strap changes can be performed with meticulous care, with every phase documented via WhatsApp.

Yes, a quality aftermarket strap is perfectly compatible with the Patek Philippe Complications 5131R-001, provided it features a 20-millimetre lug width. Casati Milano artisanal straps are designed and constructed to the same precision standards as the Geneva manufacture, ensuring fit, comfort and durability over time.

The lifespan of a leather strap depends on the material and usage conditions. Alligator and shell cordovan from vegetable tanning maintain structural and aesthetic integrity for 8–12 years of daily wear. Vegetable-tanned calf tends to show signs of ageing after 4–5 years, but develops a more rapid and fascinating patina. Casati Milano provides an 18-month warranty on manufacturing defects, with the possibility of reconditioning thereafter.