Strap for Zeitwerk Striking Time Platinum

The lug width of the Zeitwerk 145.025 is 21 millimetres. This measurement is determined by the case geometry and represents the internal space between the lugs where the strap must fit. It is an established standard in watchmaking that ensures balanced proportions relative to the 44.20-millimetre case diameter.

For the Zeitwerk 145.025 in platinum, an alligator strap in polished black or vegetable-tanned calf is recommended. Alligator represents the most coherent choice with A. Lange & Söhne's constructive philosophy, owing to its natural grain and capacity to develop character over time. Calf offers a contemporary alternative with organic ageing and warm patina development.

Strap replacement requires removal of the original lugs from the case side springs using a specialist tool (spring bar remover). First measure the internal distance between the lugs to verify correct lug width (21mm). Insert the new strap by aligning the holes correctly with the lugs, then verify proper fit. If uncertain, consult an authorised service centre.

Yes, aftermarket straps compatible with 21mm lug width are fully suitable for the Zeitwerk 145.025. We recommend selecting high-quality leather (alligator, vegetable-tanned calf, shell cordovan) to maintain aesthetic and constructive coherence. Always verify correct lug width before purchase to ensure complete compatibility.

The lifespan of a leather strap depends on usage, climate, and material choice. High-quality alligator, with regular maintenance (avoiding stagnant water and excessive humidity), can last 5–8 years. Vegetable-tanned calf has similar durability if kept dry. Leather is an organic material that ages naturally and characterises the watch; periodic replacement is part of responsible stewardship of a horological work.