Strap for Datograph Pink Gold / Black

The A. Lange & Söhne Saxonia 403.031 features a lug width of 20 mm. This measurement corresponds to the internal distance between the two case lugs and is the standard specified by Lange & Söhne for this model to maintain the aesthetic harmony of the 39 mm case. Any strap you select must have a width of exactly 20 mm for proper fitting.

For the Saxonia 403.031 in 18-carat rose gold, alligator leather in vegetable tanning represents the orthodox choice: the natural grain of the skin dialogues perfectly with the rationality of the lacquered dial. Shell cordovan is an excellent alternative if you prefer a smoother texture and a patina that develops nobly over time. Calfskin remains a valid option for those desiring visual lightness, whilst NATO straps in nylon are inadvisable on an object of this constructive calibre.

To change the strap on your Saxonia 403.031, you will require a dedicated tool to extract the spring bars. Position the bar in the lower aperture of the tool, apply upward pressure to release the internal spring, and the bar will disengage. Remove the old strap and insert the new bar from the same side, pressing until the click of engagement. If unfamiliar with the procedure, contact Casati Milano for atelier service: this guarantees artisanal precision and preserves the technical characteristics of the case.

Yes, provided the lug width is precisely 20 mm. Any artisanal strap with this dimension is compatible with the Saxonia 403.031. Quality depends on materials: alligator in vegetable tanning, shell cordovan and premium calfskin ensure aesthetic coherence with the constructive calibre of the watch. We advise against synthetic straps or industrial finishes, which would create an unresolved visual contrast.

The lifespan of a leather strap depends on material quality and usage patterns. High-quality alligator or shell cordovan, vegetable-tanned, typically lasts 4–6 years of daily wear in temperate climates. Factors such as humidity, direct sunlight exposure and frequency of wear affect longevity. Casati Milano provides an 18-month guarantee on manufacturing defects: beyond this period, wear is natural and the strap may be refinished or replaced. The patina that develops is part of the beauty of natural leather, not a deficiency.