Strap for Langematik Perpetual White Gold / Blue / 20th Anniversary

The lug width (strap width) of the A. Lange & Söhne Saxonia 310.028 is 20 millimetres. This measurement is standard for the model and is perfectly proportioned to the 38.50 mm case diameter in white gold. To verify compatibility, measure the external distance between the two lug attachments with a digital calliper, ensuring total compatibility with bespoke replacement straps.

The ideal strap depends on usage and aesthetic preference. For classical conformity, dark brown alligator with vegetable tanning represents the prototypical choice: natural grain, predictable ageing, and visual coherence with the watch's understated design. Havana-coloured shell cordovan offers natural lustre and exceptional durability. For daily wear without maintenance, FKM rubber with a woven texture guarantees grip and longevity. Polished black is recommended only for specific formal contexts, as the austere symmetry of the dial benefits from warmer tones.

Strap replacement is executed by removing the suspension pins (spring bars) from the case lugs. Position the watch on a soft cloth, insert a thin tool (spring bar tool) beneath the first pin, gently push inward to release the spring, and withdraw the pin from the lug. Repeat for the second side. Insert the new pins into the replacement strap, align the strap attachments with the lugs, and press the first pin until the securing click is felt. The process requires delicacy to avoid damage to the white gold lugs.

Yes, any strap with a 20 millimetre lug width is compatible with the 310.028. MilanoStraps.it offers a comprehensive collection of bespoke straps in this measurement, including alligator, calf, shell cordovan, and FKM rubber. Casati Milano additionally provides a customisation service by appointment at the Milan atelier, enabling direct customer selection of leather with technical consultation and an 18-month warranty against manufacturing defects.

Leather strap durability depends on material and usage patterns. An alligator or calf strap with vegetable tanning, worn regularly (4-5 times weekly), typically lasts 5-7 years before requiring replacement due to wear. Shell cordovan, owing to superior structural density, may reach 8-10 years. FKM rubber offers even greater longevity, up to 10-12 years. Periodic maintenance (gentle cleaning, conditioning with specific creams every 12-18 months) significantly extends useful life. Natural ageing of leather is regarded positively by collectors, as it develops a unique, personalised patina.