Strap for Frogman Auto Chrono 43 Titanium / Black

The lug width is precisely 22 millimetres. This measurement is critical: a 20mm strap will not fit into the attachment holes, whilst a 24mm strap will cause excessive movement during diving. To verify, measure with a ruler the distance between the two holes of the lugs at the base of the case.

It depends on usage. For tactile elegance: vegetable-tanned alligator. For chromatic evolution over time: shell cordovan. For marine practicality: stabilised Cordura NATO rated 400+ kg/m². For field reliability: vulcanised natural rubber. All available in 22mm.

Remove the caseback (requires a case opener); expose the spring bar attachments. Use a spring bar remover to gently push the spring towards the case centre, sliding the old strap free. Repeat on the opposite side. Position the new 22mm strap and reinsert the springs until you hear an audible click.

Yes, provided it is certified 22mm. Verify that integrated lugs have sufficient thickness (minimum 4-5mm) to prevent oscillation. Avoid straps manufactured for budget sports watches: construction quality differs significantly. An artisanal aftermarket leather or rubber strap is often superior to the OEM strap.

With vegetable tanning and regular maintenance (annual cleaning and conditioning), 4-6 years before structural failure. In salt-spray marine climates, durability halves. Natural rubber resists 3-5 years. Cordura NATO, if not subjected to continuous repositioning, lasts 8-10 years without functional loss.