Strap for Pilot's Watch Doppelchronograph Stainless Steel / Black / French / Bracelet

The lug width of the IWC Pilot IW3713-20 is 21mm. This dimension represents the distance between the two lugs on the case where the strap attaches. It is essential to verify this measurement with a calliper or ruler, positioned perpendicular to the lugs at the attachment point, to ensure a perfect fit without play or forcing.

The choice depends on intended use. For elegance, we recommend genuine alligator in dark tones (black, teak brown, burgundy), which amplifies the case's authority. For daily wear, vegetable-tanned calf leather develops character with time. For a purist interpretation with aviatory vocation, dark shell cordovan or a NATO strap in black parachute cloth. For tool-watch application, FKM rubber with anchor deployment ensures security even with gloves.

The strap is exchanged using spring bars that pass through the case lugs. With a spring bar tool, apply inward pressure to release the internal spring and extract the bar from its seat. Once both bars are removed, the old strap is taken off. The new strap is inserted by passing the spring bars through the holes, ensuring the return spring clicks perfectly into position. This operation should be performed carefully or by a professional to avoid case damage.

Yes, any strap with a 21mm lug width is compatible with the IW3713-20. Quality aftermarket straps—artisanal or from specialised brands—often offer superior customisation options compared to original IWC straps, including choice of premium leathers, custom finishes, personalised stitching, and special treatments. The key is verifying the lug width is exactly 21mm to ensure secure attachment without lateral movement.

Strap longevity depends on material and usage. A genuine alligator strap with vegetable tanning, if well maintained, lasts 5–8 years with daily wear and continues to improve aesthetically with ageing. Vegetable-tanned calf has similar lifespan. Shell cordovan, being a very dense leather, can last 10+ years. FKM rubber has superior longevity (15+ years) but ages differently. Regular maintenance—protection from excessive moisture, periodic cleaning, light conditioning—significantly extends strap life.