IWC
Pilot IW3883-09 (aka: IW388309)— lug 20mm

The IWC Pilot's Watch Chronograph Top Gun IW3883-09 features 20-millimetre lugs. This measurement represents the distance between the tips of the lugs that protrude from the ceramic and red gold case. It is the dimension that correctly identifies compatible straps in the aftermarket.

The ideal strap depends on usage: for elegance, a mahogany or taupe alligator, or vegetable-tanned leather enhance the red gold case. For aviator-tactical style, a vulcanised rubber or military canvas strap amplify the instrument's character. Shell cordovan offers a middle ground with a patina that ages towards burgundy, perfect for those who appreciate aesthetic evolution over time.

To change the strap you need a thin spring bar removal tool. Position yourself in front of a mirror or under a lamp, grasp the tool and apply light lateral pressure on one of the lugs: you will see the small pin retract. Remove one end of the old strap, then the other. Insert the new strap in the same sequence: one end at a time, ensuring the pins remain in position. The operation takes less than two minutes once you have acquired the technique.

Yes, any strap with a 20mm lug width is physically compatible. Milano Straps and Casati Milano artisanal straps are customisable to ensure the exact internal circumference measurement, so that the strap embraces the wrist without looseness or constriction. Compatibility is guaranteed by international standardisation of lug width.

A quality leather strap (alligator, vegetable-tanned leather, shell cordovan) lasts between 3 and 5 years of daily wear, conditioned by exposure to perspiration, moisture and UV rays. The leather develops a patina that tells the passage of time: minute cracks create natural grain, whilst the edges fray slightly. Many collectors alternate straps to extend their lifespan. Casati Milano offers an 18-month warranty on all straps, with the possibility of revision or replacement of aged edges.