Patek Philippe
Complications 5960/1A-010

The lug attachment is an integral part of the case design: the lugs merge with the original bracelet structure and do not accept standard straight spring bars. A bespoke strap, built directly on the watch, is entirely achievable. This is the work carried out by <a href="/pages/casati-booking">Casati Milano</a>, which takes precise measurements from the actual lugs of the client's watch and designs each end piece to the specific geometry of this reference.

The starting point is always the client's physical watch, brought to the atelier during the appointment. The master craftsman takes all necessary measurements directly from the watch: lug shape, lining curvature, strap height. Only after this precise survey does the selection of leather, stitching, edge colour and buckle type begin. The strap is delivered already fitted to the watch.

The model's dual identity — technical yet high-manufacture — calls for leathers with their own aesthetic gravitas. Fine-grain box calf develops a natural patina over time that complements the satin-finished surfaces of the case. Smooth alligator, with its regular scale texture, responds to the polished steel surfaces. Cordovan suits those seeking a noble ageing process and a compact texture suited to intensive daily wear.

A strap built with first-choice leather, reinforced stitching and correct finishing can last many years with ordinary care. Longevity depends on the type of leather, frequency of use and exposure to moisture and perspiration. A bespoke strap, precisely because it is built to the specific geometry of the watch, distributes stress evenly, reducing the localised wear that often compromises mass-produced straps.

The CH 28-520 IRM QA 24H integrates a column-wheel flyback chronograph with a complete annual calendar — date, day, month — and a power reserve indicator, all within a 41mm case. The column wheel ensures mechanically precise management of chronograph sequences, while the flyback function allows the counter to be zeroed and restarted with a single gesture. It is one of the few movements in the world to bring these complications to such a coherent and legible level of integration on the dial.