Patek Philippe · Twenty~4

Strap for Twenty~4 4910 Tiffany Stainless Steel / White

Integrated bracelet: measurements, the most common questions, and the way to a made-to-measure strap.

Integrated bracelet

The Patek Philippe Twenty~4 4910/10A T is designed with a bracelet integrated into the case. For a compatible made-to-measure strap, the Casati Milano atelier builds it on your watch.

Case diameter25 mm
Reference4910/10A T
FamilyTwenty~4
MovementPatek Philippe caliber E15 hours, minutes
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

The Twenty~4 4910/10A T, seen from the bench

The Patek Philippe Twenty~4 4910 is a rectangular stainless steel sports-elegant watch launched in 1999 for women's wrists. The model features a 25.10mm case with integrated bracelet design. Milano Straps' Atelier Casati Milano offers bespoke custom leather strap solutions respecting the original architecture, selecting exceptional materials like Mississippi alligator or premium Swift leather.

Frequently asked questions

Can a standard strap be fitted to the Patek Philippe Twenty~4 4910/10A T?

No, and I say that plainly out of respect for your time. The bracelet is integrated into the case: there are no traditional lugs to attach a ready-made strap. The only viable path is to build a bespoke attachment, studying the case morphology directly at the bench. It is work I carry out solely in the atelier, with the physical watch in hand.

How does the bespoke strap service work for this model?

I work exclusively by appointment at <a href="/pages/casati-booking">Casati Milano</a>, at Via XX Settembre 15 in Milan. You bring the watch, I take the measurements from the actual case — no remote estimates, no approximations. I build the attachment millimetre by millimetre, to honour the original lines of the Twenty~4. We agree on production times together during the consultation.

Which leather do I recommend for the Patek Philippe Twenty~4?

I favour Swift Premium, in dusty pink or bordeaux tones. The Twenty~4 was conceived for the female wrist and for daily wear — it is not a watch meant to sit in a safe. Swift has a fine grain, a soft hand feel and ages quietly, never overwhelming the rectangular case. I reserve alligator for evening occasions, when the watch shifts into a completely different register.

How long does a well-made strap last?

With quality leather and ordinary care, I count on five to seven years of regular use. The most common mistake is always fastening the strap at the same hole: the leather folds in the same spot and marks earlier. Rotating between two straps extends the life of both. Good leather does not deteriorate — it transforms, taking on the character of the person wearing it.

The Twenty~4 was launched in 1999 — what keeps it relevant today?

Patek Philippe made a precise choice: design a watch that works equally well at breakfast and at dinner, with nothing changed in between. The rectangular steel case and the continuous bracelet form a coherent architecture, not a compromise. I have seen many 'ladies' watches age poorly because they chased trends. The Twenty~4 does not — it has an internal logic that holds up over time.

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 →

Casati Milano · Via XX Settembre 15, Milan · by appointment only