Strap for Kleine Lange 1 Soirée Pink Gold / Black MOP

The lug width of the A. Lange & Söhne Lange 1 813.043 is 19 millimetres. This measurement is specific to Lange 1 collection models and is essential for selecting a compatible strap. To verify it, measure the distance between the two holes at the ends of the case with a digital calliper.

For the 813.043 in rose gold, we recommend straps in cognac or brown alligator, mogany shell cordovan, or vintage-patina hammer-grained calf leather. Rose gold naturally complements warm tones. For elegant contrast, a black shell cordovan or navy blue alligator creates deliberate visual tension. For dynamic contexts, a black FKM rubber with deployante clasp maintains sophistication.

The strap is changed by removing the two side spring bars from the case. Use a dedicated spring bar removal tool to push the bars inward and slide them out of the lugs. Remove the worn strap, insert the bars into the new strap ensuring proper alignment, then press the bars until they snap securely at the case ends. Always verify the strap has a 19mm lug width.

Yes, you can use a high-quality aftermarket strap provided it has exactly 19 millimetres lug width. Verify the strap was specifically constructed for this measurement. An artisan-made alligator, shell cordovan, or calf leather strap, with lugs contoured for the Lange 1 case, ensures aesthetics and reliability comparable to original straps, often with greater colour and texture variety.

A high-quality leather strap (alligator, shell cordovan, vegetable-tanned calf) typically lasts 3 to 7 years, depending on wear, sun exposure, and tanning method. Vegetable tanning develops patina over time, increasing visual appeal. With proper maintenance (avoid excessive humidity, occasionally clean with soft cloth, rotate between multiple straps), longevity increases significantly. Casati Milano straps include an 18-month warranty against manufacturing defects.