Strap for Annual Calendar Chronograph 5905 Platinum / Green

The lug width of the Patek Philippe Complications 5905P-014 is 18 millimetres. This measurement represents the internal distance between the two metal lugs fixed to the case and determines which strap is compatible with the watch. You can verify it using a calliper positioned between the two lugs.

For a Patek Philippe Complications in platinum, we recommend a black or dark blue alligator gautré strap, which creates tonal harmony with the case without contrasting. Alternatively, shell cordovan in cognac or burgundy offers evolving patina over time. Vegetable-tanned leather is ideal for those seeking ethical authenticity and textured grain. The compatible lug width is 18 millimetres.

Changing the strap on a Patek Philippe requires a fine-tipped spring bar tool and a protected surface. Position the watch with one side facing up, insert the tool tip into the access hole, lift the spring slightly until one end of the pin is released, then extract it. Repeat on the other side. Proceed gently: the platinum case scratches easily. If unsure, entrust the service to Casati Milano.

Yes. High-quality 18mm aftermarket straps are available from specialised artisans such as Casati Milano, which supplies selected leathers (alligator, cordovan, calf) with custom craftsmanship. You can select the material, colour and buckle type (deployante, tang buckle) at the atelier by appointment. Online you will find a selection of ready-made 18mm straps.

A natural leather strap (alligator, cordovan, calf) on the 18mm size typically lasts 3-5 years with daily wear, depending on the leather and maintenance. Alligator gautré lasts longer thanks to its scaled structure; cordovan and calf age more quickly but develop fascinating patina. Avoid prolonged exposure to water and perspiration, clean regularly with a dry cloth. Casati Milano guarantees 18 months against manufacturing defects.