Strap for Diver Automatic Black / Calf

The lug width of the Formex Diver 2100.1.7020.213 is 22mm. This width accommodates structured and robust straps suitable for professional use in marine environments. Measuring the lug width requires positioning a digital calliper between the two attachment pins, centre to centre, excluding the case shoulders.

Three strap categories are recommended for the Formex Diver 2100.1.7020.213. Vegetable-tanned alligator offers an aesthetic narrative coherent with the case's robustness and develops patina over time. NATO in Cordura nylon is ideal for frequent diving, ensuring rapid drying in salt water environments. FKM rubber represents the definitive engineering solution for chemical resistance and extended UV durability.

Changing the strap on a timepiece with 22mm lugs requires a spring bar removal tool. Position the watch on a stable support, insert the tool tip into the small hole adjacent to the lug pin, lever gently downward to release the internal spring, and slide the pin laterally. Repeat for the other side. Insert the new strap following the reverse process, verifying that the pins click securely into position.

The Formex Diver 2100.1.7020.213 accepts aftermarket straps with a 22mm lug width. Compatibility extends to leather, alligator, calf, military NATO, and FKM rubber straps. The construction quality of the strap must reflect the technical seriousness of the watch: use of low-quality synthetic straps that communicate instability at the wrist is discouraged.

A quality artisanal leather strap maintains structural integrity for 3-5 years of daily use on a professional diver such as the Formex. Durability varies according to UV exposure, ambient humidity, and frequency of drying after salt water contact. A strap regularly exposed to salt water environments without controlled drying will have reduced service life. Vegetable tanning, in particular, requires occasional protective treatments to preserve flexibility and tensile strength.