IWC
GST Aquatimer IW3707-08— lug 22mm

The lug width of the IWC GST Aquatimer IW3707-08 measures exactly 22mm. This width is proportioned to the 39.70mm case diameter and ensures aesthetic balance on the wrist. To verify your measurement, remove the current strap and measure the internal space between the lugs using a digital caliper positioned perpendicular to the case.

The choice depends on intended use. For frequent diving, we recommend Tropic rubber or cordura NATO for quick drying. For daily wear, mississippiensis alligator offers elegance and sophisticated texture, while vegetable-tanned calf develops a natural patina that ages harmoniously alongside the steel case.

The GST Aquatimer uses standard spring bars for this size. Remove the old strap by unscrewing the spring bars with a dedicated spring bar tool. Insert the new 22mm strap into the lugs and screw the bars back until fully locked. Avoid forcing to prevent damage to the strap.

Yes, any strap with a 22mm lug width is mechanically compatible with the GST Aquatimer IW3707-08. Aesthetic compatibility depends on your choice of material, color, and thickness. We recommend premium materials (alligator, calf) or functional options (rubber, NATO) to respect the watch's technical character and build quality.

A premium leather strap (alligator or calf) on a GST Aquatimer exposed to occasional diving typically lasts 2-4 years before requiring replacement. Frequent water use reduces durability to 12-18 months. Tropic rubber and cordura NATO straps are significantly more durable (3-5 years) because they do not absorb moisture. Proper maintenance and quick drying extend the strap's lifespan.