A. Lange & Söhne
Lange 1 101.047— lug 20mm

The lug width is 20 millimetres. This dimension is specific to the Lange 1 101.047 and determines compatibility with any aftermarket strap or bracelet. To measure correctly, use a digital calliper and measure the internal distance between the lugs without applying pressure to the case.

Alligator remains the classical choice, but shell cordovan and vegetable-tanned calf offer exceptional results. Alligator provides fineness and aesthetic coherence; shell cordovan develops deep patina over time; vegetable-tanned calf increases chromatic movement. For sporty contexts, a canvas NATO maintains versatility without stylistic compromise.

The change requires specific tools: spring bar extractors and a stable work surface. Carefully remove the pins from the case, disconnect the worn strap, and replace it with the new one, ensuring the pins enter the 20mm lugs symmetrically. If you are inexperienced, entrust the task to a certified watchmaker to avoid scratching the case.

Yes, provided the lug width is exactly 20mm. A high-quality artisanal leather or technical rubber strap is not only compatible but transforms the aesthetic identity of the watch. Choose materials that respect the case proportions and the chromatic tone of rose gold: brown, cognac, black, and navy blue are considered and versatile choices.

Durability depends on use, climate, and leather type. A quality alligator or shell cordovan strap, if worn regularly and kept dry, lasts 4–7 years before replacement is needed. Vegetable-tanned calf ages more quickly but develops fascinating patina. Rubber and canvas NATO straps last longer but wear differently. Avoid prolonged exposure to moisture and direct sunlight.