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

The lug width of the Longines Heritage L2.836.4.52.9 is 22mm. This measurement refers to the distance between the two integrated lugs on the stainless steel case, measured from inside to inside. It is a consolidated standard in heritage and sports segments, widely supported by artisanal strap manufacturers. Always verify this specification before purchasing a compatible strap, using a digital calliper or official Longines documentation.

For the Heritage L2.836.4.52.9, straps in genuine alligator, Italian calf leather with fine grain (tobacco, cognac, antique mahogany tones), or NATO canvas in grey-beige are ideal. The choice depends on the desired aesthetic: alligator evokes the era of transatlantic flight, calf leather offers modern versatility, NATO canvas emphasises the aviatic vocation. Essential is verifying that the lug width is 22mm and that the passant allows air circulation.

Strap replacement is carried out by means of the spring bars that connect the strap to the case lugs. To remove the original strap: (1) obtain a dedicated tool (spring bar tool) or a small flat screwdriver; (2) position the tip under the pin, pushing upward to free it from the seat; (3) carefully withdraw the strap. To install the new one: (4) align the holes of the new strap with the lugs; (5) insert the pin into the appropriate slot; (6) press with the tool until you hear a click indicating secure locking. If unsure, consult a professional watchmaker.

Any strap with a 22mm lug width is compatible with the Longines Heritage L2.836.4.52.9. MilanoStraps offers a curated collection of 22mm straps in various materials: vegetable-tanned Tuscan leather, Italian calf, genuine alligator, NATO canvas, structured FKM rubber. All are customisable in length (to accommodate different wrist sizes), embroidered initials, and choice of stitching thread. Consult the 22mm catalogue to find the style that best interprets your watch.

A quality leather strap (Tuscan leather, Italian calf, genuine alligator) has an average lifespan of 3-5 years with moderate daily wear, provided proper maintenance. Factors influencing longevity: prolonged moisture exposure (significantly shortens lifespan), perspiration (accelerates wear), rotation with other straps (reduces stress), regular cleaning with a damp cloth. Leather develops a natural patina over time, a desired aspect. If the strap shows cracks, fraying at edges, or musty odour, replacement is necessary. With conscious maintenance and mindful use, some artisanal straps actually improve aesthetically over the years.