A. Lange & Söhne
1815 231.035— lug 19mm

The lug width of this model is precisely 19.00 mm, as specified in Lange & Söhne's official technical specifications. To verify compatibility correctly, measure the distance between the two lateral pins of the case using a digital calliper. Do not use approximations: undersized straps (18 mm) or oversized straps (20 mm) will not sit correctly on the lugs.

For a platinum case, we prioritise Mississippi alligator with fine grain or French vegetable-tanned calf. Alligator offers constructive rigidity and a satin finish that echoes the case's texture. Calf develops natural patina over time and creates interesting aesthetic contrast with the case's minimalist geometry. Shell cordovan is the choice for those accepting a steeper learning curve in exchange for uncompromised personality and longevity.

The strap is attached via spring bars located inside the lugs. To remove the current strap, use a spring bar tool (a thin, flat-tipped instrument) to push the pin downward whilst extracting the strap. The new strap enters by first inserting one end of the lug into the spring, then pushing the second spring into position until it clicks. Each step must be performed carefully to avoid scratching the platinum case. If you lack experience, entrust the operation to a professional.

Yes, any strap with a 19.00 mm lug width is mechanically compatible. However, material choice and finishing significantly affect the final aesthetic. A bespoke artisanal strap in alligator or vegetable-tanned calf, constructed to your wear requirements and colour preferences, far better honours the platinum case than a generic strap. On milanostraps.it you will find verified options for this specific model.

A quality artisanal leather strap, used on a non-sport watch, has an average lifespan of 4–6 years with moderate daily wear. Determining factors: tanning type (vegetable versus synthetic), material (alligator, calf, cordovan), direct sun exposure, ambient humidity, frequency of drying after water contact. Alligator ages better than standard calf. A shell cordovan strap can last 7–10 years, developing precious patina. Casati Milano guarantees 18 months against manufacturing defects; beyond that, wear is natural and desirable.