Strap for Ultra-Chron Diver Box Edition

The lug width (ansa width) of the Longines Heritage L2.836.4.52.8 is 22 millimetres. This width is standard for robust watch straps and accommodates substantial materials such as vegetable-tanned leather and technical rubber whilst maintaining balanced proportions on a 43mm case. Measure your watch by placing a ruler between the two lateral attachment pins.

Tuscan vegetable-tanned leather in Havana tone is the ideal choice for this model. The natural tannage develops a rich patina over time, reflecting the aviator heritage and vintage aesthetic of the black dial. Quality alternatives include black calf leather with honey-coloured stitching for formal contexts, Horween shell cordovan in bordeaux for timeless elegance, and dark grey technical rubber for functional durability and sweat resistance.

The process is straightforward: obtain a spring bar removal tool. Position the watch with the lower lug facing you, insert the tool tip into the small lateral hole of the spring pin to compress the internal spring, then extract the pin. Repeat for the second pin. Install the new strap by reversing the procedure, ensuring both pins lock completely on either side.

All straps with a 22mm lug width are compatible. On milanostraps.it you will find a comprehensive collection of artisanal 22mm straps in Tuscan vegetable-tanned leather, calf, shell cordovan and rubber, customisable in length, colour and stitching thread. They are pre-fitted with stainless steel lugs and buckles.

A Tuscan vegetable-tanned or quality calf leather strap lasts 3–5 years in daily use with regular maintenance. Longevity depends on mechanical wear (constant flexing at the keeper), moisture exposure and storage conditions. Technical rubber resists 5–7 years without aesthetic degradation. Casati Milano guarantees 18 months on bespoke straps, covering manufacturing defects and abnormal wear.