Strap for Pilot's Watch Doppelchronograph Yellow Gold / Black / German

The lug width of the IWC Pilot IW3713-13 is 21 millimetres. It is measured by calculating the internal distance between the passing lugs. This measurement is non-standard in the watch market and requires specific expertise to manufacture compatible straps that present no mechanical play.

For a Pilot in yellow gold with 42-millimetre case, alligator remains the most harmonious choice: aesthetic regularity, natural patina and natural dialogue with precious metal. Shell cordovan offers an alternative of equal prestige with more pronounced chromatic evolution. Vegetable-tanned calf provides daily softness without compromising luxury.

The change requires gentle extraction of the passing lugs using a specific tool (spring bar tool). Position the watch with the lug facing downward, apply pressure upward on the spring mechanism to release tension, then extract. The new strap is inserted by aligning the holes with the lugs and pressing gently until they lock into place.

Yes, provided it is constructed precisely with 21-millimetre lug width. Not all manufacturers possess this expertise. It is essential to verify the manufacturing tolerance of thickness and width to avoid mechanical play that would compromise wearability and durability.

A quality strap in alligator or shell cordovan typically lasts 4-6 years with daily use, considering exposure to perspiration and humidity. Shell cordovan tends to develop patina creasing after 2-3 years, a normal event that characterises its aesthetic evolution. Vegetable tanning provides superior durability if protected from excessive salt-water exposure.