Strap for Langematik Perpetual White Gold

The Saxonia 310.026 is fitted with a 20 mm lug width. This measurement represents the distance between the two spring bars positioned on either side of the case. To verify, observe the metal attachments on the case flanks: their internal separation is 20 mm. Any compatible strap must respect this exact dimension.

The Saxonia 310.026, being a masterpiece in white gold with a perpetual calendar movement visible through the caseback, deserves high-level leather straps. Ideal choices are: genuine alligator (raven black or dark cognac), European calf with vegetable tanning (warm brown, burgundy), or shell cordovan (authentic burgundy). Avoid NATO or rubber straps, which would compromise the Teutonic design identity. Your leather choice should amplify the watch's severity, not dilute it.

The strap is secured to the case via two spring bars (spring attachments) positioned at the case lugs. To remove it, use a spring bar removal tool (a small, flat instrument available from jewellers or online retailers). Insert the tool into the spring bar's slot, gently lever downward to compress the internal spring, then extract the attachment from the case seat. Repeat on the opposite side. Install the new spring bars (compatible with 20 mm) into the new strap, then secure the strap to the case by reversing the procedure. If uncertain, consult a professional watchmaker.

Yes, provided the strap is manufactured for 20 mm lug width and fitted with compatible spring bars. A quality aftermarket strap (alligator, calf, cordovan) does not void the brand's official warranty, though it must be purchased from specialist retailers. Casati Milano crafts bespoke straps for the Saxonia: you can select the leather in the Milan atelier and monitor the entire production process. Avoid generic e-commerce straps: your A. Lange deserves artisanal dedication equivalent to its own.

A leather strap's lifespan depends on tanning method, colour, and usage patterns. Calf leather with vegetable tanning (such as Casati Milano's) typically lasts 5–7 years with daily wear, potentially longer with rotational use. Genuine alligator comfortably reaches 8–10 years. Shell cordovan is exceptionally durable, often exceeding 10 years. Longevity extends if exposure to sunlight and water remains moderate. Casati Milano's warranty covers manufacturing defects for 18 months from delivery. Leather ages naturally: the patina that develops is treasured by collectors, not a flaw.