A. Lange & Söhne
Lange 1 101.061— lug 20mm

The lug width (ansa width) of the A. Lange & Söhne Lange 1 101.061 is 20 mm. This dimension is standard for this model and must be verified precisely when purchasing a compatible strap. Use a digital calliper to check the internal width of the original strap if you still have one, ensuring the new strap enters smoothly into the spring bar attachments without forcing.

Alligator leather remains the ideal choice for a Lange 1 in platinum: its pronounced grain and organised texture echo the precision of the L901.0 calibre visible on the dial. Alternatively, vegetable-tanned calf leather offers sobriety and develops a natural patina over time. Shell cordovan represents the optimal compromise between durability and elegance, ageing beautifully. Daily use of rubber or NATO straps is not recommended, as they diminish the perception of the case's weight and importance.

The strap of the Lange 1 101.061 is secured via spring bar attachments located at the case lugs. To remove the original strap, use a dedicated spring bar tool to gently compress the attachment and release it. Remove the old strap and insert the new one the same way, ensuring the bar sits completely within the lug. If you are unfamiliar with the procedure, it is advisable to consult a specialised service centre or Casati Milano to avoid case damage.

Yes, you can use aftermarket straps with 20 mm lug width. However, we recommend bespoke artisanal straps of superior quality to maintain the aesthetic and constructional integrity of your A. Lange & Söhne. Generic 'universal' straps of similar dimensions may not fit the attachments precisely. Casati Milano manufactures custom straps for this reference with an 18-month warranty against manufacturing defects.

Durability depends on the leather type and usage patterns. An alligator or shell cordovan strap with vegetable tanning and artisanal construction resists 5–7 years with ordinary maintenance (regular cleaning, drying after humidity exposure). Vegetable-tanned calf tends to wear more rapidly, approximately 3–5 years. Leather ageing is natural and often desirable on a Lange 1: the patina narrates your watch's history. To extend lifespan, avoid prolonged moisture exposure and rotate daily straps with alternatives.