Strap for Pilot's Watch Spitfire Chronograph Stainless Steel / Silver / Strap

The lug width of the IWC Pilot IW3717-02 is 21.00mm. This is a precise engineering specification: the case lugs have been dimensioned to accommodate straps of this width, ensuring uniform tension and stability. Always verify the measurement between the attachment points before ordering an aftermarket strap.

For the IW3717-02 we recommend crocodile alligator with fine grain and natural patina, or vegetable-tanned calf leather in cognac brown or deep black. A rubber strap remains the most versatile choice for humid environments. Avoid shell cordovan, which stylistically contrasts with the satin finish case. A stainless steel deployante clasp enhances overall constructive coherence.

Insert the strap removal tool (or a thin flat screwdriver) into the hole along the lug, gently push downward to release the elastic pin. Repeat on the opposite side. Insert the new strap, align the holes, and reposition the pin by pressing until it clicks. The procedure takes 2-3 minutes and requires no specialised equipment.

Yes, quality 21mm aftermarket straps can be sourced from specialised brands. However, this width is less common than 20mm or 22mm options. MilanoStraps offers a dedicated selection of 21mm straps compatible with the Pilot, customisable in leather type, colour, sizing and stitching details.

A quality leather strap (crocodile alligator or vegetable-tanned calf) typically lasts 3-5 years with regular daily wear. Durability depends on ambient humidity, frequency of use and maintenance (periodic cleaning and conditioning). Casati Milano straps come with an 18-month warranty and can be refurbished or replaced at the bespoke atelier.