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

The lug width of the IWC Pilot IW3706-15 is 20mm. This measurement represents the distance between the internal spring bar pins of the case and determines strap compatibility. You can verify it by positioning a rigid calliper between the two pins: you will obtain a measurement of exactly 20 millimetres.

Alligator remains the most sophisticated choice for the IW3706-15, with fine texture and regular scales that harmonise with the watch's instrumental aesthetic. For those seeking patina and durability, shell cordovan excels thanks to its dense fibres that develop organic lustre over time. Vegetable-tanned calf leather offers balance between elegance and sustainability, while NATO or structured rubber remains legitimate for sporty use.

Equip yourself with a spring bar tool and a soft surface to protect the case. Position the watch face-down, release the small elastic pin on the inside of the current strap using the tool, and slide the strap out of the spring bars. Insert the new 20mm strap, ensuring the pin is fully seated and protected by the case shoulders.

Yes, absolutely. Any strap certified with 20mm lug width is compatible. Ensure the strap allows suitable length for your wrist (typically, artisanal straps offer bespoke length options). MilanoStraps straps are customisable in length, leather colour and thread colour, guaranteeing a perfect fit.

A quality leather strap (alligator, calf, shell cordovan) typically lasts 5–10 years under regular wear conditions, with proper care. Durability depends on tanning, fibre density, and frequency of wear. Oily leather, such as shell cordovan and vegetable-tanned calf, tends to age more nobly, developing patina. MilanoStraps straps include an 18-month warranty and resist wear better thanks to double sartorial stitching.