A. Lange & Söhne
1815 234.041— lug 20mm

The lug width of the A. Lange & Söhne 1815 234.041 is 20 mm. This dimension maintains harmonious proportions between the 39 mm case, crown, and lugs. To verify, measure the internal distance between the two lugs on your original strap.

American alligator represents the natural choice for the 234.041: the geometric grain of the belly scales harmonises with Germanic constructive order without visual excess. Vegetable-tanned calf leather is an elegant alternative for those desiring natural ageing and patina development. For sporty use, structured rubber straps maintain the formal severity of the Lange whilst shifting it into casual territory.

The 234.041 uses a standard straight lug system with 20 mm width. You will need a spring bar removal tool to extract the metal pin connecting the strap to the case. Insert the tool into the small hole beneath the lug, press gently to slide the pin, then remove the old strap. Repeat on the second side. Install the new strap by aligning the holes and reinserting the pin with firm pressure until you hear a click.

Yes, any strap with a 20 mm lug width (internal distance between the lugs) is compatible. Ensure the leather quality — thickness, finish, buckle or deployant construction — matches the craftsmanship of your Lange. Artisanal straps such as those from Casati Milano are specifically constructed for German luxury watches with identical durability and finishing standards.

A high-quality artisanal alligator or calf leather strap lasts between 3–5 years with daily wear, depending on exposure to perspiration, humidity, and frequency of use. Vegetable-tanned leather ages visibly: it develops patina, micro-cracking, and colour variation, yet maintains functionality even beyond 5 years. If you rotate straps seasonally or replace every 2–3 years, longevity extends considerably. Maintenance — avoiding prolonged water exposure and drying after humidity — preserves leather integrity.