Strap for Master Collection Power Reserve

The lug width of this model is 20 millimetres. This specification determines strap compatibility: a 20mm strap will attach perfectly to the case lugs without lateral play. Measurement is performed by positioning a digital calliper between the inner extremities of the lugs, ensuring accuracy when purchasing online.

A strap in dark brown or tobacco alligator represents the most coherent pairing with yellow gold, creating sophisticated visual contrast. For greater versatility, calf leather with vegetable tanning in cognac or medium brown tones offers patina evolution over time. Avoid silvered materials that would create chromatic conflict with the case.

The change is performed by removing the spring bars (or push-out pins if applicable). Use a purpose-made watch tool or fine metal point, working at a padded table surface to avoid scratches. Insert the new 20mm strap into the lugs, verifying that the distance between its extremities adheres perfectly to the case.

Yes, any strap manufactured for the 20mm lug width is compatible with the Master Collection L2.666.6.78.5. Always verify the size specified by the vendor before purchase. Artisanal straps online are ready for dispatch; for a bespoke experience, the Casati Milano atelier creates custom straps with personal leather selection and 18-month warranty.

Durability depends on leather quality and usage. A high-quality alligator or calf strap with careful maintenance (avoiding stagnant water, periodic cleaning) maintains elasticity and appearance for 3–5 years with daily wear. Vegetable-tanned leather develops natural patina that increases appeal over time. Rubber or technical material straps offer greater longevity, exceeding 5–7 years without significant degradation.