IWC
Pilot IW3713-23— lug 21mm

The lug width of the IWC Pilot IW3713-23 is 21mm. This measurement is the historical standard for the Pilot family and ensures balanced proportions on the 42mm case. Always verify the measurement before ordering a strap by measuring the internal distance between the two lugs without including the lugs themselves.

For the platinum case, a slate grey alligator or brown-mahogany shell cordovan is ideal. Alligator maintains a neutral and elegant tone, enhancing the platinum without competing. Cordovan develops a natural golden patina over time. For a sportier context, dark brown vegetable-tanned calf or a 3-colour NATO fabric strap offer an authentic and functional alternative.

To change the strap, you will need a spring bar tool. Position the watch with the dial facing downward, insert the tool's tip into the recess beneath each lug, apply light downward pressure to compress the internal spring, then extract the pin. Repeat for the opposite lug. Proceed in reverse order to mount the new strap. If unsure, entrust the task to a specialised workshop.

Yes, absolutely. A quality aftermarket strap made by certified artisans (such as those available in 21mm size) is perfectly compatible. The key is respecting the 21mm lug width, choosing noble materials, and ensuring the fitting is performed by a professional. Artisan quality often surpasses OEM in terms of patina and ageing characteristics.

A quality leather strap, whether vegetable-tanned or shell cordovan, typically lasts 18-36 months of daily continuous wear, depending on exposure to humidity and perspiration. The patina that forms is desirable and follows the natural ageing of the leather. Proper conditioning with specific balms and rotation among several straps (3-4 alternated) substantially extends overall longevity.