Strap for Hydroconquest GMT 41 Stainless Steel / Brown / Bracelet

The lug width is 21mm. This specific measurement is taken internally, from case wall to case wall, and is fundamental for complete strap compatibility. The 21mm dimension represents optimal proportioning for a 41mm case, ensuring aesthetic balance without structural compromise.

Alligator with fine grain is the most coherent choice: natural texture reduces friction on ceramic and creates chromatic harmony with the bezel inserts. Vegetable-tanned calf offers personalised patina development over time, ideal for those who appreciate aesthetic evolution. For regular diving use, nitrile rubber or woven NATO straps guarantee durability and practicality.

Strap change occurs via removal of the spring bars connecting the lugs to the case. You need specific tools: a caseback opener or a small spring bar extractor. Each lug has two pins: one is extracted slightly inward to release the spring, allowing old strap removal. The operation takes approximately 5 minutes for experienced users. If you lack confidence, contact an authorised Longines service centre or Casati Milano atelier.

Yes, provided the aftermarket strap is specifically designed for 21mm lug width. Compatibility is not merely a matter of millimetres, but of construction quality: the internal keeper must have minimal play to prevent undesired rotation on the case. Milanostraps.it artisanal straps are manufactured with precise dimensional control and available in 21mm with materials selected for this measurement.

A vegetable-tanned leather strap lasts between 3 and 5 years with daily wear, thanks to natural patina evolution that reduces visibility of potential scratches. Lifespan depends on frequency of use, ambient humidity and maintenance: prolonged saltwater exposure accelerates degradation. Alligator straps have longer durability (5-7 years) due to more resistant scaly structure. Casati Milano atelier offers replacement with 18-month warranty on every ordered strap.