Strap for Pilot's Watch Chronograph Solidarity with Beirut

The lug width of the IWC Pilot IW3777-31 is 21 millimetres. This measurement is taken between the two lateral pins (the small metal bars that support the strap). A compatible strap must fit precisely between these lugs without play or forcing.

For the IWC Pilot IW3777-31 we recommend alligator in cream/off-white for monochromatic elegance, vegetable-tanned calf for visible ageing, dark blue NATO for aviation authenticity, or black rubber for maximum instrument practicality. Your choice depends on use case: formal, daily wear, or sport-technical.

The process is straightforward: locate the lateral lug pins (small metal bars). Using a spring bar tool, apply gentle pressure to compress the internal spring, then extract the old strap. Insert the new 21mm strap ensuring the pin clicks into place. Verify compatibility with your 21mm lugs.

Yes, any strap with a 21-millimetre lug width is fully compatible. The universal spring bar pin adapts perfectly. Online you'll find an extensive selection of artisanal 21mm straps in leather, fabric, and rubber, ready to replace the original stock.

A quality leather strap (alligator, vegetable-tanned calf) typically lasts 3–5 years of daily wear, depending on climate, frequency of use, and maintenance. Vegetable tanning is more durable and improves with ageing. Superior artisanal straps are engineered to last up to 10 years with proper care.