Strap for Tourbograph Pour le Mérite F.A. Lange

The lug width of the A. Lange & Söhne Tourbillon 712.050 is 20mm. This measurement should be taken with a digital calliper at the inner distance between the lugs, at the level of the lower bezel. It is advisable to verify the actual gap rather than relying solely on nominal specifications, as honey gold cases may present minor manufacturing tolerances that affect the fit of aftermarket straps.

For the 712.050 in honey gold, a vegetable-tanned alligator strap in cognac, tobacco, or midnight blue offers the most coherent pairing with the case's chromatic character. Hornback or belly grain alligator interacts effectively with the smooth texture of honey gold. Shell cordovan is an alternative offering a denser surface that develops a distinctive patina over time. A deployant clasp in yellow gold completes the metallic consistency of the ensemble.

The strap on the 712.050 is replaced using a 20mm spring bar, removable with a flat-tip or forked springbar tool. It is recommended to work on a soft surface to protect the honey gold case from scratches. Given the value of the material, it is preferable to entrust the operation to a qualified watchmaker or to the Casati Milano atelier, who can simultaneously inspect the condition of the spring bars and the case.

Yes, aftermarket straps with a 20mm lug width designed for the proportions of the 712.050 are available. It is important to select straps with a pre-curved end to accommodate the curvature of the honey gold lugs and ensure proper fit on the wrist. Milano Straps offers a selection of 20mm vegetable-tanned leather, alligator, and shell cordovan straps compatible with this reference, with a bespoke customisation option through the Casati Milano atelier.

The lifespan of a leather strap depends on the material and daily care. A quality vegetable-tanned alligator strap, properly maintained and rotated with other straps, can last between three and five years while retaining its structural and aesthetic integrity. Shell cordovan tends to last even longer due to the density of its fibres. It is advisable to avoid prolonged exposure to moisture and chemicals, and to apply a suitable leather conditioner periodically to preserve the material's flexibility.