Technical Archive

Bulgari
B.Zero1 102398

Bulgari B.Zero1 102398: strap made to measure on the watch at the Casati Milano atelier, by appointment.

B.Zero1 Two Tone Diamond

Technical Specifications

Bulgari 102398
Reference

102398

Movement

Bulgari caliber B033 Hours, Minutes

The Heritage

The Bulgari B.Zero1 mounts the B033 caliber with indication of hours and minutes. The model features a construction that takes up the distinctive stylistic elements of the brand's namesake collection. The reference 102398 maintains the characteristic proportions of the B.Zero1 line.
Made to Measure

The strap for this watch is made to measure

On the Bulgari B.Zero1 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

Which strap is most suitable for the Bulgari B.Zero1 102398?

For the 102398, we recommend crocodile leather with natural grain to enhance the tubular case geometry, or quality calf leather treated with vegetable tanning that develops a caramel patina over time. Shell cordovan is excellent for those who appreciate natural lustre and durability. For more casual applications, high-end technical NATO straps or FKM rubber offer resistance whilst maintaining aesthetic integrity. Selection depends on daily usage and personal colour preferences.

How do you change the strap on the Bulgari B.Zero1 102398?

Changing the strap on the 102398 requires a spring bar tool (a small forked extractor) to remove the pins from the case lugs—an operation that must be performed with care to avoid scratching the pink gold. Position the tool in the lateral holes of the spring bar, press gently downward to release the internal spring, then withdraw the old strap. Align the new strap's holes with the pins, then use the extractor tool to re-insert the pins into their seats, verifying mechanical engagement.

How long does a leather strap last on the Bulgari B.Zero1 102398?

Strap longevity depends on material, tanning method, and usage patterns. Quality crocodile or vegetable-tanned calf leather can last 3-5 years with daily wear, developing a patina that increases character. Shell cordovan tends to last longer (4-6 years) due to its density. Ageing is part of the aesthetic: the strap does not deteriorate but evolves. To extend lifespan, avoid prolonged moisture exposure and occasionally apply leather-specific conditioners.

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