IWC
Pilot IW3705-06 (aka: IW370506)— lug 20mm
IWC Pilot IW3705-06 (aka: IW370506): 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 20mm lug width to preserve the original sartorial balance."
Technical Specifications
IWC IW3705-06 (aka: IW370506)The essential strap measurement.
Browse 20mm straps →IW3705-06 (aka: IW370506)
IWC caliber 7922 Hours, Minutes, Small Seconds | Date, Day | Chronograph
The Heritage
Compatible Straps
Selected for the 20mm lug width of the Pilot
FAQ
What is the lug width of the IWC Pilot IW3705-06?
The lug width (or ansa) of the IWC Pilot's Watch Chronograph IW3705-06 is precisely 20 millimetres. This measurement is standard for IWC's chronographs in the mid-case diameter range and permits the attachment of bespoke leather and fabric straps.
What is the best strap for the IWC Pilot IW3705-06?
There is no absolute 'best', but rather contextual choices. For formal wear, vegetable-tanned alligator or black vitello in matching tone. For daily use with visible ageing, brown shell cordovan. For authentic aeronautical character, NATO in grey or navy-blue ballistic nylon with stainless steel deployante.
How do I change the strap on my IWC Pilot IW3705-06?
Remove the spring bars using a dedicated spring bar tool. Insert the thin blade between the lug and spring bar, compress the spring, extract the bar. Install the new spring bars into the holes of the new strap's ansa and insert them into the watch lugs. Exercise caution to avoid scratching the case.
Can I use an aftermarket-compatible strap on my Pilot IW3705-06?
Yes, absolutely. A quality bespoke strap with a 20mm ansa fits the IW3705-06 lugs perfectly. Ensure the strap is constructed to correct specifications and does not protrude from the case lugs. Milanostraps straps are tested for IWC Pilot's Watch compatibility.
What is the lifespan of a leather strap on my Pilot IW3705-06?
Durability depends on tanning method and frequency of wear. A vegetable-tanned vitello strap, worn daily, typically lasts 3–5 years before requiring significant maintenance. Shell cordovan, being denser, exceeds 7–8 years. Hermès-quality alligator can last 10+ years. Proper care (drying after rain, treatment with natural waxes) significantly extends usable life.
The next step
The right strap isn’t chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →By appointment only · Milan
The atelier's website: casatimilano.com