A. Lange & Söhne
Saxonia 301.025— lug 19mm

The lug width is 19 mm. This dimension is critical to maintain the original proportions of the 36.80 mm case. The acceptable tolerance is ±0.2 mm: oversized lugs will create excessive play, whilst undersized lugs will compress against the case attachments.

Nilotic alligator with vegetable tanning is the most congruent choice: the natural texture reflects the austere aesthetics of the watch. Shell cordovan develops stratified patina over time and represents an excellent alternative. Hand-sewn calf leather with vegetable tanning offers compactness and humidity resistance. Avoid industrial chrome-tanned synthetic leather, which culturally contradicts the constructive rigour of the manufacture.

Use a spring bar tool to extract the peg (spring bar) from one of the lugs. Insert the tool tip into the dedicated aperture and lift the peg outward, maintaining constant tension. Remove the old strap and insert the new one by sliding the peg through the attachment holes. Verify that the peg is fully seated and the strap rests evenly on both lugs.

Yes, any strap with a 19 mm lug width is compatible, provided it respects the ±0.2 mm tolerance. Bespoke artisanal straps offer superior coherence with the watchmaking philosophy. Always verify that the strap loops do not bind on the lugs and that the curvature matches the case saddle geometry.

A quality leather strap (alligator or shell cordovan with vegetable tanning) lasts 3–5 years with daily wear, developing desirable patina over time. Longevity depends on UV exposure, humidity and frequency of use. A strap reserved for formal occasions can endure 7–10 years. Casati Milano's manufacturing warranty covers 18 months on all materials against production defects.