A. Lange & Söhne
1815 421.056FE— lug 20mm

The lug width of the A. Lange & Söhne 1815 421.056FE is precisely 20 mm. This dimension represents the exact space between the two lugs of the case, where the strap must fit without play or lateral tension. It is a precise and non-interchangeable measurement, typical of Glashütte Manufacture's classical models. To verify it, use a digital calliper positioned perpendicularly between the metal lug pins.

For the platinum 421.056FE, the finest strap option is alligator leather in medium brown or black tone. Alligator offers naturally regular grain and develops a silvered patina at wear points, creating perfect aesthetic dialogue with platinum. A sophisticated alternative is shell cordovan, which acquires natural lustre with ageing. Both materials embody the aesthetic dignity that platinum demands.

To change the strap, you will need a spring bar tool. Position the flat end of the tool in the small hole beneath the lug, applying gentle inward pressure to compress the spring. Once released, extract the metal pin and remove the old strap. Insert the new strap through the pin and reinsert the lug into the case. Repeat the operation on the opposite lug. If you are not experienced, we recommend contacting Casati Milano for safe replacement.

Yes, any strap with a 20 mm lug width is compatible with the 421.056FE. Milano Straps offers a dedicated collection of straps in alligator, shell cordovan, calf leather and other noble materials, specifically designed for this measurement. We recommend choosing premium materials—such as alligator or vegetable-tanned calf—to maintain the aesthetic dignity of platinum. Casati Milano can create custom straps with personalised consultation.

A noble leather strap—alligator, shell cordovan or quality calf—has an average lifespan of 3-5 years with regular wear (4-5 days per week). Durability depends on frequency of use, climatic conditions and care. A strap exposed to frequent perspiration or intense humidity ages more rapidly. It is advisable to rotate between multiple straps to dilute wear and preserve each piece. Casati Milano provides an 18-month warranty on manufacturing defects, regardless of the strap's natural ageing.