Strap for Langematik Perpetual Platinum / Bracelet

The lug width of the Saxonia 310.225 is 20 mm. This dimension is specific to this model and represents the correct proportion for the 38.50 mm case diameter in platinum. The measurement is taken by inserting a digital calliper into the case lugs, verifying the internal distance between the two pins.

The ideal strap depends on usage context. For formal elegance, we recommend high-grade alligator with fine grain (navy or mahogany tones), or vegetable-tanned calf leather that develops patina over time. For pragmatic daily wear, shell cordovan offers austere durability, whilst NATO fabric and FKM rubber provide sporting versatility. Every material must respect the constructive austerity of the L922.1 movement.

Remove the current strap by gently extracting the lateral lug pins with a thin tool (spring bar tool). The 310.225 pins are not secured, so extreme care is necessary. Insert the new pins into the new strap, aligning them with the case lugs, and push until they click into place. If unfamiliar with the procedure, consult a specialised watch service centre.

Yes, provided it meets quality standards and features a 20 mm lug width. We recommend straps from specialised suppliers guaranteeing dimensional precision and premium materials (alligator, calf, shell cordovan). Avoid generic manufacturers: platinum and the L922.1 movement deserve equivalent craftsmanship, not standardisation. The 20 mm straps from milanostraps.it are tested for compatibility with Saxonia models.

Lifespan depends on leather quality and usage intensity. A first-grade alligator or calf with vegetable tanning lasts approximately 3-5 years with daily wear, developing progressive patina that enriches aesthetics. Shell cordovan, being more robust, exceeds 6-7 years. FKM rubber resists up to 10 years under normal conditions. To maximise longevity, avoid prolonged exposure to water and perspiration, and gently clean with a soft dry cloth. Casati Milano offers an 18-month guarantee against manufacturing defects on artisanal straps.