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

The IWC Pilot IW3706-23 has a lug width of 20 millimetres. This dimension is measured internally between the two lugs (the metal protrusions) that hold the strap. To verify the measurement accurately, use a digital calliper positioned perpendicularly between the attachments: the result must be exactly 20mm. This precision ensures complete compatibility with any strap produced for this lug width.

For the IW3706-23, we recommend leather straps with vegetable tanning (cognac or dark brown) for historical authenticity, or alligator for elevated elegance. If you use the watch in sports or intense daily contexts, a canvas NATO ensures practicality and durability. A vulcanised rubber strap represents the modern choice for absolute versatility. Your choice depends on context: formal settings suggest leather or alligator, casual and sporting suggest NATO or rubber.

To change the strap on the IW3706-23, you'll need a spring bar removal tool. Locate the two metal side pins that hold the strap to the case lugs. Gently insert the flat tip of the spring bar tool under the pin, applying light pressure to free it from its seat. Repeat on the other side. Once the pins are removed, extract the old strap. To install the new 20mm strap, align the holes and reinsert the pins, ensuring they are fully locked in position.

Yes, the IW3706-23 is fully compatible with aftermarket 20-millimetre straps. Any strap produced for 20mm lug width (whether in leather, alligator, NATO or rubber) will fit perfectly to the case lugs. We recommend choosing quality brands that guarantee finishing consistent with the watch's calibre. The IW3706-23's stainless steel lugs work well with deployantes in both stainless steel and gold, depending on your desired look.

The lifespan of a leather strap for the IW3706-23 varies based on material and usage. A quality vegetable-tanned leather strap, worn daily under normal conditions, typically lasts 3–5 years before showing significant signs of wear. Premium leathers such as alligator or shell cordovan can exceed 7 years. Lifespan extends if you wear the watch occasionally or in controlled settings. To extend strap life, avoid prolonged exposure to excessive moisture, direct sunlight and extreme temperatures. Periodic maintenance with specialist creams keeps leather soft and prevents cracking.