Technical Archive

Patek Philippe
Twenty~4 4909/102R

Patek Philippe Twenty~4 4909/102R: strap made to measure on the watch at the Casati Milano atelier, by appointment.

Twenty~4 4909/102 Rose Gold / Sapphire

Technical Specifications

Patek Philippe 4909/102R
Reference

4909/102R

Movement

Patek Philippe caliber 16-250 Hours, Minutes

The Heritage

The Twenty~4 represents the Patek Philippe women's line characterized by a rectangular case. It mounts the 16-250 quartz caliber with hour and minute indications. The reference 4909/102R features a rose gold case with an integrated bracelet in the same alloy.
Made to Measure

The strap for this watch is made to measure

On the Patek Philippe Twenty~4 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.

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FAQ

Can a strap be fitted to the Patek Philippe Twenty~4 4909/102R?

The Twenty~4's attachment is an integral part of the case design: a standard aftermarket strap is not conceived for this proprietary geometry. A bespoke strap built directly on the watch is the proper solution, and it is precisely the work carried out by <a href="/pages/casati-booking">Casati Milano</a> atelier after taking the actual measurements of the case on the original piece. The result is a strap that integrates with the watch as though it had always been part of it.

How does the bespoke strap-making process work for this model?

Everything begins with an appointment at Casati Milano atelier, where the craftsman takes a direct physical survey of the case — profile, thickness and lug geometry are recorded from the actual piece, not from generic technical specifications. The strap is then built on that foundation, with leather, finish, keeper, buckle and stitching chosen together with the client. There are no standard sizes: every strap is an individual commission.

Which leather best suits the character of the Patek Philippe Twenty~4 4909/102R?

The rose gold of the Twenty~4 has a warm chromatic temperature that pairs best with fine-grained, smooth-surfaced leathers. Box calf, with its luminous patina that deepens over time, offers great aesthetic coherence; alternatively, matte Alligator mississippiensis adds material depth without competing with the brilliance of the stones. For colours, burgundy, dusty nude and warm chocolate all engage with rose gold in a balanced way.

How long does a well-crafted bespoke strap from Casati Milano last?

Longevity depends on the leather chosen, daily use and care, but a bespoke strap made from first-grade hides and hand-stitched using a saddle stitch can accompany the watch for many years, developing a personal patina that enriches its character over time. The quality of construction — correct thickness, robust lugs, well-proportioned buckle — prevents the premature failure typical of industrial straps. Periodic care with appropriate leather products extends its life further.

When was the Twenty~4 introduced, and what does it represent within Patek Philippe's production?

The Twenty~4 was presented by Patek Philippe in 1999 with the explicit intention of creating a ladies' watch suitable for every moment of the day, not only formal occasions. Within the manufacture's production it occupies a specific position: it is the timepiece that brings High Watchmaking closer to the everyday life of the contemporary woman, without compromising the finishing levels and attention to detail that distinguish every piece signed by Patek Philippe. The reference 4909/102R, in rose gold with diamonds, represents one of the most refined expressions of this line.

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.

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By appointment only · Milan

The atelier's website: casatimilano.com