Strap for Pilot's Watch Doppelchronograph Stainless Steel / Black / German / Strap

The IWC Pilot IW3713-01 has a lug width of 21 millimetres. This measurement defines the exact space between the two lugs on the case where the strap attaches. Measured perpendicularly on a flat surface, you should read precisely 21mm. Any compatible strap must respect this dimension to guarantee a secure, precise fit.

The optimal strap depends on intended use. For everyday elegance, quality alligator with vegetable tanning and natural patina complements the watch's technical heritage. Shell cordovan is the choice for those seeking longevity and colour evolution. For frequent flying or saline environments, an FKM rubber in black or navy blue maintains grip without corroding the steel case. The 21mm geometry also accommodates NATO canvas straps, provided the keeper is proportioned correctly.

Strap replacement requires a spring bar tool. Position the watch with lugs facing upward, insert the tool's tip into the small groove beneath the lug, apply gentle pressure to release the spring bar, and remove the old strap. Repeat on the opposite side. To install the new strap, align it carefully and press until you hear a distinct click from the spring. If you prefer to avoid risk, entrust the task to a professional horologist.

Absolutely. The IWC Pilot IW3713-01 accepts any strap with a 21mm lug width, whether in steel or leather. Artisanal straps from milanostraps.it are specifically designed for this dimension and offer superior quality versus generic OEM alternatives. Always verify that the strap has been tested on 21mm lugs and that the buckle or deployante are compatible with your watch's diameter and thickness.

A quality leather strap—such as alligator or shell cordovan with vegetable tanning—withstands 3–5 years of moderate daily wear. Longevity depends on climate (humidity reduces lifespan), cleaning frequency, and maintenance. Natural, untreated leather visibly evolves: it darkens and softens progressively. If the strap is frequently exposed to salty perspiration, lifespan reduces to 2–3 years. Straps from Casati Milano include an 18-month warranty and may be rejuvenated through artisanal intervention.