Strap for Ultra-Chron Diver Stainless Steel / Black / Bracelet

The lug width of the Longines Heritage L2.836.4.52.6 is 22mm. This measurement is critical for purchasing compatible straps. It is measured by calculating the distance between the inner lugs (the inner shoulders of the lugs). Straps of different sizes will not fit correctly on the case.

For this classic 43mm model, the ideal strap is made of vegetable-tanned Tuscan leather (aged tobacco) or calf leather with a tight grain. Both maintain the technical-elegant character of the watch and develop a natural patina over time. Alternatively, structured alligator is recommended for formal contexts, while NATO fabric straps offer operational practicality.

Strap replacement is carried out by removing the spring bars that connect the lugs to the case. You will need an appropriate spring bar tool: insert the flat tip into the space between the lug and the strap, lift slightly to loosen the pin, then extract it. Install the new strap by repeating the operation in reverse. It is recommended to have a professional guide you through your first strap change.

Yes, provided they are 22mm lug width. Quality aftermarket artisanal straps offer significant advantages: choice of superior materials, customisation in length and stitching, and often a better value-for-money ratio compared to branded straps. Ensure the strap has adequate thickness and structural rigidity for the mass of the case.

A quality leather strap (vegetable-tanned or shell cordovan) can last 3-5 years with regular use, provided it is subject to periodic maintenance: cleaning with a soft cloth, rapid drying after water contact, and occasional application of leather-specific balm. The ageing of leather is part of the material's natural beauty. Rubber straps typically last 4-7 years before requiring replacement due to material hardening.