IWC
Pilot IW3706-16 (aka: IW370616)— lug 20mm

The lug width of the Pilot IW3706-16 is precisely 20 millimetres. This measurement is verified by placing a digital calliper between the two spring bar pins on the case. It is essential not to confuse this measurement with the case diameter (39mm): the lug width determines which strap will fit, whilst the diameter concerns only visual proportions.

The ideal strap depends on intended use and colour preferences. For formal-sporting wear, Mississippi alligator in cognac or vegetable-tanned calf in tobacco brown are recommended. For tactical or humid environments, FKM rubber offers superior moisture resistance. Shell cordovan represents the compromise between nobiliary material and exceptional durability: it develops a natural patina over time and maintains structural integrity for over twenty years.

The strap is removed by acting on the spring bar pins with a dedicated tool (spring bar tool). Position the tool beneath the pin, compress the spring slightly and slide the pin outward. Repeat for the opposite pin. Installing the new strap follows the same procedure in reverse order. Verify that the pin is fully seated in the new strap before wearing the watch.

Yes, any strap with a 20mm lug width is compatible. Milano Straps offers customisable options in superior leather (alligator, shell cordovan, vegetable-tanned calf) certified and inspected before dispatch. It is essential to verify the exact lug width: deviations of 0.5mm create friction during installation.

Durability depends on material and use. Vegetable-tanned calf resists 3-5 years with daily wear, developing an appreciable natural patina. Alligator offers 5-7 years whilst maintaining articulate texture. Shell cordovan easily reaches 15-20 years, often exceeding that span. FKM rubber has comparable durability to alligator if kept away from direct heat. Correct monthly cleaning and conditioning with specialised creams significantly extend the life of any strap.