Strap for Perpetual Calendar 5140 Rose Gold Brown

The lug width of the 5140R-001 is precisely 20 millimetres. This measurement is the horizontal distance between the two attachment lugs on the case, where the strap fastens. To measure accurately, position a digital calliper perpendicularly between the lugs across the case diameter. A 20mm strap ansa ensures precise fitting without play in the case lugs.

Alligator leather with traditional tanning is the recommended choice for the 5140R-001. Its fine and regular grain complements the sober elegance of the rose gold case, and its lower porosity ensures chromatic stability over time. Alternatively, vegetable-tanned calf leather develops a natural patina that harmonises beautifully with the ageing of the rose gold itself. For summer simplicity, a silk NATO strap remains appropriate, provided it is of artisanal manufacture.

The 5140R-001 strap is changed via the horizontal attachment lugs located at the case ends. Use a dedicated spring bar removal tool to gently push the lug inward, thus releasing one end of the strap. Extract the lug completely, remove the old strap and insert the new one by aligning it with the lug holes. Reinsert the lug until it clicks into place. If inexperienced, consult a certified watchmaker.

Yes, any strap with a 20mm lug width is compatible with the 5140R-001. However, for a timepiece of this refinement, it is highly advisable to choose high-quality artisanal straps: natural leather vegetable-tanned or genuine alligator, with finishes in rose gold or stainless steel. Avoid synthetic or industrially-produced straps, which contrast visually and tactilely with the mechanical complexity of the watch.

A high-quality natural leather strap, subject to routine maintenance, retains integrity and aesthetic appearance for 3-5 years of daily wear. Alligator tends to last longer than calf, owing to its lower porosity. Longevity depends on sun exposure, humidity and frequency of wear. An artisanal strap, if properly preserved and repaired when necessary, can be regenerated through reconditioning at the atelier that produced it.