A. Lange & Söhne
Lange 1 811.064— lug 19mm

The lug width is 19 millimetres, measured between the two lugs of the rose gold case. This specification is critical for ensuring that an aftermarket strap seats flush against the case lugs without lateral play or misalignment.

The optimal choice is alligator crocodile leather in mid-range quality, in cognac or shell-brown tones. The chromatic resonance with rose gold is historically established and visually harmonious. An alternative of equivalent prestige is vegetable-tanned Italian calf, which offers a drier texture and more pronounced ageing characteristics.

Position the watch on a leather cushion to prevent scratches. Use a dedicated spring bar tool to compress the internal spring locking the strap to the lugs. Insert the tool into the small holes inside each lug, compress gently until the strap releases, then repeat on the opposite lug. Align the new strap with the lugs and allow the spring to reposition naturally.

Yes, provided the strap is specifically dimensioned to 19 mm lug width. Technical compatibility is determined by lug width alone, not by brand. However, we recommend verifying that the strap is constructed from quality materials equivalent to the watch—alligator, shell cordovan, or vegetable-tanned leather—to honour the premium nature of the timepiece.

A professionally crafted alligator or calf strap has an indicative lifespan of 5 to 7 years under daily use. Longevity depends on solar exposure, humidity, and frequency of strap rotation. Leather ages rather than deteriorates, developing patina and character. Minimal maintenance—occasional cleaning—significantly extends serviceable life.