Technical Archive

Patek Philippe
Twenty~4 4908/101G-001

Patek Philippe Twenty~4 4908/101G-001: strap made to measure on the watch at the Casati Milano atelier, by appointment.

Twenty~4 4908/101 White Gold

Technical Specifications

Patek Philippe 4908/101G-001
Reference

4908/101G-001

Movement

Patek Philippe caliber E15 Hours, Minutes

The Heritage

The Patek Philippe Twenty~4 ref. 4908/101G-001 is a rectangular ladies' watch in 18k white gold with a 24.00mm case diameter and 20mm lug width. Launched in 1999, it features a mother-of-pearl dial, diamond-set bezel, and manual-wind Caliber E15 movement with hours and minutes only. Designed for daily wear, this jewel-watch combines chronometric precision with refined aesthetics.
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

What is the lug width of the Patek Philippe Twenty~4 4908/101G-001?

The lug width of the Patek Philippe Twenty~4 4908/101G-001 is 20 millimetres. This measurement is specific to this model and must be strictly observed when selecting a replacement strap. Correct measurement is taken between the inner edges of the two lugs of the case. A strap with an incorrect lug width will not fit properly and will compromise the aesthetic and functional integrity of the timepiece.

Which strap is most suitable for the Patek Philippe Twenty~4 4908/101G-001?

For the Patek Philippe Twenty~4 4908/101G-001, we recommend a strap in Swiss or French alligator leather, which reflects the jewelled character of the watch and develops a fascinating patina over time. Alternatively, vegetable-tanned calf leather offers softness and authentic patina development. For more practical daily use, shell cordovan represents the choice for those seeking durability and water resistance. In summer, an FKM rubber strap combines practicality with a refined appearance.

How do you change the strap on a Patek Philippe Twenty~4 4908/101G-001?

Changing the strap on the Patek Philippe Twenty~4 4908/101G-001 requires using a dedicated spring bar tool to compress the elastic pins (spring bars) of the case and remove them from their housings. This operation should be performed on a soft surface, such as a cloth, to avoid damage to the case. If you are not familiar with this procedure, we recommend contacting an authorised Patek Philippe service centre or an experienced watchmaker. Casati Milano offers the strap change service at the Milan atelier by appointment.

Is it possible to use an aftermarket strap on the Patek Philippe Twenty~4 4908/101G-001?

Yes, it is possible to use an aftermarket strap (non-original Patek Philippe) provided it strictly adheres to the 20-millimetre lug width and is made from high-quality materials, preferably handcrafted. A quality aftermarket strap does not compromise the value of the timepiece and allows greater aesthetic versatility compared to the original bracelet. The handcrafted straps from milanostraps.it, made in alligator, calf, and shell cordovan leather, are specifically designed for luxury watches and guarantee comfort, durability, and construction finesse.

What is the average lifespan of a leather strap for the Patek Philippe Twenty~4 4908/101G-001?

The average lifespan of a leather strap depends on the material and usage. A quality alligator strap lasts approximately 3–4 years of daily wear before requiring replacement, developing a fascinating patina during this period. Vegetable-tanned calf leather has a similar lifespan of about 3–4 years, with the advantage of a softness that improves over time. Shell cordovan, thanks to its denser molecular structure, can last 4–5 years. These timeframes extend significantly if the watch is not worn daily. Regular maintenance (cleaning, protection from excessive moisture) extends the useful life of the strap.

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