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

The IWC Pilot IW3713-47 features a lug width of 21mm. This measurement is the prescribed standard for tactical watches in this category and represents the ideal geometric proportion relative to the 42mm case diameter. To verify it, position a ruler between the two attachment points on the case where the strap is inserted.

The choice depends on your intended use. For formal elegance, we recommend satin-finished black alligator or shell cordovan, which develops extraordinary patina over time. For tactical use, a vegetable-tanned calf strap combines softness and durability. For aviation versatility, a NATO in reinforced cordura remains unsurpassable. Every 21mm option is compatible: your decision reflects your predominant context of use.

Remove the watch from your wrist. Locate the small pin that runs through the lug at each end of the strap. Use a dedicated spring bar tool to gently press the pin inward, creating sufficient clearance to extract the strap from the lugs. The new 21mm strap will slide into the same position: reinsert the pin and verify it is securely locked. The operation takes a few minutes and requires no technical expertise.

Absolutely. Any quality strap with a 21mm lug width is compatible with the IW3713-47. Milanostraps offers an extensive selection of artisanal straps, from alligator to shell cordovan to vegetable-tanned calf, all crafted with manufacturing finishes. The Casati Milano atelier additionally creates bespoke straps customisable in leather, dimensions and thread colour, guaranteed for 18 months.

A quality leather strap (alligator, shell cordovan, vegetable-tanned calf) typically lasts 3-5 years with daily use and standard maintenance. Durability depends on exposure to perspiration, moisture and care in drying. The patina that develops is not deterioration but natural evolution: the leather darkens and acquires character over time. When the strap fails, replacement is quick (a few minutes) and economical.