Strap for Pilot's Watch Doppelchronograph Platinum / Blue / French / Strap

The lug width of the IWC Pilot IW3711-28 is 21 millimetres. This is the internal distance between the horizontal pins of the case. This specification must be strictly observed when selecting an aftermarket strap: a tolerance of ±0.1mm is the maximum acceptable to ensure a precise mechanical change with no play between the platinum case and the strap itself.

There is no absolute choice, but rather three options coherent with the constructive philosophy of the model: dark brown alligator, which develops rich patina whilst maintaining structural rigidity; vegetable-tanned calf in cognac colour, for those who prefer leather that ages with character; cordura NATO with stainless steel deployant, for pilots in humid or corrosive environments. The choice depends on intended use and personal aesthetic preference.

The change requires a spring bar tool (mechanical instrument with two flat and curved ends). Position the watch on a stable surface, locate the horizontal pin on the case, gently lift the old strap using the tool to compress the internal spring of the pin. Once the pin is released, remove the old strap and insert the new one by sliding the pin into the new lugs. Repeat the operation on the opposite lug. Avoid abrupt movements to prevent damaging the platinum case.

Yes, provided the strap is constructed with the correct 21mm lug width and the leather thickness does not exceed 3.5 millimetres (to avoid friction with the case). Artisanal straps are perfectly compatible, provided they are manufactured according to IWC technical specifications. Atelier Casati Milano creates personalised straps guaranteed for this model with precise constructive tolerances.

The lifespan of a leather strap depends on the material and usage. An alligator with traditional vegetable tanning lasts on average 5-7 years with daily wear, developing a natural patina that increases its aesthetic value. A vegetable-tanned calf, being softer, requires more careful use and lasts on average 3-4 years. Cordura NATO straps exceed 10 years. Ambient humidity, sun exposure and contact with salt water accelerate ageing. Atelier Casati Milano offers an 18-month warranty on all straps manufactured.