Strap for World Time Chronograph 5935 Stainless Steel / Salmon

No. The bracelet is integrated directly into the case with a proprietary attachment: no standard strap will fit. It is a deliberate construction choice, not a shortcoming — but it requires a different approach. In the atelier I build every attachment element to measure, shaped around the actual geometry of that watch.

I work by appointment only at <a href="/pages/casati-booking">Casati Milano</a>, in Via XX Settembre 15. I bring the watch to the bench, study the curve of the case and build the attachment by hand, millimetre by millimetre. I do not use standard measurements: every strap is born from that specific watch.

I prefer naturally aged Barenia. This watch has a sporting soul but carries the full complexity of a great complicated movement: Barenia reflects that well, starting pale and darkening with wear in an honest way. For a more formal look I choose Mississippi Alligator with large scales — it holds the right tone without sitting heavily on the wrist.

With basic care — keeping it away from prolonged water exposure, letting it breathe between wearings — I have seen Barenia straps last ten years and improve over time. Quality leather does not deteriorate: it transforms. A strap treated with respect becomes part of the watch.

It is the first annual calendar chronograph in steel that Patek Philippe ever produced. Before this reference, a complication of this depth — annual calendar integrated with a chronograph — existed only in gold. Steel changed the audience it spoke to, without touching the substance of the CH 28-520 IRM QA 24H calibre. I have rarely seen a watch capable of combining such technical depth with such a direct character.