Patek Philippe
Nautilus 5990/1A-001
Patek Philippe Nautilus 5990/1A-001: strap made to measure on the watch at the Casati Milano atelier, by appointment.
Technical Specifications
Patek Philippe 5990/1A-0015990/1A-001
Patek Philippe caliber CH 28-520 C FUS Hours, Minutes, Additional 12 Hour Hand (adjustable), Day / Night Indication, Small Seconds | Date | Chronograph, Column wheel
The Heritage
The strap for this watch is made to measure
On the Patek Philippe Nautilus the bracelet is drawn as part of the case: no catalogue strap will fit. In the atelier we take the measurements on the watch itself and build the strap on the piece — that is the work of Casati Milano.
Book a consultation →FAQ
Can a standard strap be fitted to the Patek Philippe Nautilus 5990/1A-001?
No. The bracelet is integrated directly into the case: there are no standard lugs to attach an off-the-shelf strap. It is a proprietary architecture, designed as a single unit. To replace it with leather, the only option is to build the attachment custom, on the physical watch, in the atelier.
How does the Casati Milano bespoke service work for this Nautilus?
<a href="/pages/casati-booking">Casati Milano</a> works by appointment only, at Via XX Settembre 15 in Milan. I bring the watch into the atelier, take measurements directly from the case and build every attachment by hand, millimetre by millimetre. I do not use templates: each piece is made for that specific watch.
Which leather do I recommend for the Nautilus 5990/1A-001?
I recommend naturally aged Barenia. The Nautilus is a sports watch with an elegant soul, and Barenia follows the same path: it starts understated, then forms to the wrist and gains character over time. Among all leathers, it is the one that best complements the strong geometry of the case without overpowering it.
How long does a well-made strap last on a watch of this calibre?
With quality leather and basic care — keeping it away from prolonged water exposure and letting it breathe — I easily reach five or six years of daily wear. Alligator lasts even longer. Leather does not deteriorate: it transforms, takes the shape of the wrist, becomes increasingly personal. That is one of the things I prefer about leather over metal.
What makes the Nautilus Travel Time chronograph different from other Patek complications?
The Travel Time allows you to read two time zones with straightforward logic: a second display that moves forward or back one hour at a time, without touching the main time. On a sports watch like the Nautilus, this choice makes clear sense — genuine functionality, not complication for its own sake. I have seen few movements that manage to combine practical utility and constructive rigour with this consistency.
The next step
The right strap isn’t chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →By appointment only · Milan
The atelier's website: casatimilano.com