Strap for Zeitwerk White Gold / Black

The lug width of the Zeitwerk 140.029 is 20mm. This specification is particular to the Zeitwerk family and represents the design equilibrium between the 41.90mm case diameter and visual proportion requirements. Measure the attachment points of the case with precision to confirm compatibility.

Polished alligator is the most coherent choice with the Zeitwerk's architectural aesthetic: its regular grain naturally dialogues with the geometric jump-hours. Vegetable-tanned calf is ideal for frequent wear, as it develops natural patina over time. Shell cordovan is the refined choice for evening contexts, introducing a luminosity that enhances the white gold case.

Strap replacement requires a spring bar tool to compress the retention springs and extract the pins from the lugs. We recommend having this operation performed by an authorised A. Lange & Söhne service centre or an experienced watchmaker to avoid scratches on the white gold case.

Yes, any strap with a 20mm lug width is compatible. Verify that the attachment pins (spring bars) are the correct length for the curved lugs of the case. Our handcrafted straps are designed for this precise geometry and guaranteed for 18 months against manufacturing defects.

A quality leather strap, subject to routine maintenance (regular cleaning and annual conditioning), lasts on average 3–5 years with daily wear. Longevity depends on intensity of wear, ambient humidity and type of tanning. Casati Milano straps in natural leather develop rich patina over time, preserving construction quality for decades.