Strap for Datograph Up/Down Platinum

The A. Lange & Söhne Saxonia 405.035 features a lug width of 20 millimetres. This measurement represents the space between the two spring bars (lugs) that attach the strap to the case. It is essential to verify this dimension before purchasing an aftermarket strap to ensure proper structural and aesthetic compatibility.

For the Saxonia 405.035 in platinum, solid construction materials with elevated finishing are recommended: black or anthracite grey alligator for maximum formality, vegetable-tanned calf leather for a more organic dialogue, or shell cordovan for those who appreciate the natural patina that evolves over time. Selection should consider the contrast between platinum's coldness and the need to impart wrist presence.

Strap replacement on the Saxonia 405.035 involves removing the spring bars from the case lugs using a specialised tool (spring bar tool). This procedure demands care to avoid scratching the platinum case. DIY application is discouraged; engagement with a professional watchmaker or the Casati Milano consultation service, available by appointment in Milan, is preferable.

Yes. An aftermarket strap of equivalent build quality (alligator, calf, shell cordovan) with a 20mm lug width is fully compatible. MilanoStraps offers a curated selection of 20mm straps specifically engineered for timepieces of this calibre. The Casati Milano service further permits complete customisation of the strap whilst monitoring each production phase.

Leather strap longevity depends upon frequency of wear, moisture exposure, and material quality. A premium alligator or shell cordovan strap, if worn regularly, maintains structural integrity for 3–5 years. Vegetable-tanned calf leather develops patina more rapidly but remains serviceable longer. Casati Milano provides an 18-month warranty against manufacturing defects and recommends rotating between multiple straps to extend useful life.