Strap for Spirit Automatic 40 Silver / Prestige Edition

The Longines Spirit L3.810.4.73.9 features a 21.00mm lug width. This measurement is specific to the model and determines the maximum width of the compatible strap, measured internally between the two attachment pins on the case.

For the L3.810.4.73.9, we recommend an alligator strap with vegetable tanning, which develops a golden patina over time that complements the stainless steel tone. Alternatively, European calf leather with fine grain offers a more understated and refined appearance. All straps must have an exact 21mm lug width.

The strap on the L3.810.4.73.9 is secured with two lateral spring bars. Use a dedicated spring bar tool or a fine screwdriver to gently push the bar from the inside outward. Once the bar is released, the strap removes completely. For installation, align the new strap's holes with the bars and insert carefully until fully seated.

Yes, the 21mm straps available on milanostraps.it are crafted by Italian artisan makers using premium leathers (alligator, shell cordovan, calf). Each strap is customisable in colours, thread colour, and initials, with an 18-month warranty.

A high-quality leather strap with vegetable tanning has an average lifespan of 3-5 years with daily use, varying based on sun exposure and humidity. Alligator tends to age more slowly than calf leather. Rotating between two straps significantly extends the useful life of both.