Strap for Pilot's Watch Spitfire Chronograph Stainless Steel / Black / German / Strap

The lug width of the IWC Pilot IW3706-11 is 20 millimetres. This measurement represents the internal distance between the two lugs of the case and determines strap compatibility. It is essential to verify this dimension before purchasing an aftermarket strap, as a strap with a different width will not fit properly into the lugs.

For the IW3706-11, we recommend alligator straps in black or brown for formal elegance, shell cordovan for those desiring leather that ages with character, or vegetable-tanned calf leather for durability and sustainability. NATO canvas is ideal for those who change straps seasonally. The choice depends on use: daily aviation with alligator, smart-casual attire with calf, exposure to moisture with FKM rubber.

Changing the strap on the IW3706-11 involves removing the pins that connect the strap to the case lugs. Use a dedicated tool (spring bar tool) to gently push the pin downwards, releasing the strap. Then insert the new 20mm strap and reconnect the pins until they click into place. If you are not experienced, strap changes can be performed by a watchmaker or at the Casati Milano atelier by appointment.

Yes, the IWC Pilot IW3706-11 is fully compatible with high-quality aftermarket straps as long as they feature a 20mm lug width. You can choose from dozens of materials and textures available online, from premium leather to NATO. We recommend straps with robust thickness and construction to maintain the overall quality of the watch.

The lifespan of a leather strap depends on the quality of the material and daily use. A high-quality alligator or shell cordovan strap lasts 4–6 years with regular wear, sometimes longer with proper maintenance. Vegetable-tanned calf leather guarantees 3–5 years. Ageing is natural: leather develops patina and wear, but this is part of its charm. Replacement is simple and economical compared to the initial investment in the watch.