Technical Archive

Bulgari
B.Zero1 102320

Bulgari B.Zero1 102320: strap made to measure on the watch at the Casati Milano atelier, by appointment.

B.Zero1 Two Tone Bracelet

Technical Specifications

Bulgari 102320
Reference

102320

Movement

Bulgari caliber B033 Hours, Minutes

The Heritage

The Bulgari B.Zero1 (Ref. 102320) is a two-tone watch in pink gold and steel with a 23mm case, featuring an integrated sculptural bracelet inspired by the Colosseum's spiral. Custom strap work by Atelier Casati Milano adapts premium leathers—Swift rose, Barenia honey, Mississippi alligator—to the case lugs while respecting the original design's architectural integrity.
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

Can I fit a standard strap on the Bulgari B.Zero1 102320?

No, the bracelet is integrated into the case — there are no standard lugs to attach a strap. I've seen many owners discover this the hard way. The only option is to have a bespoke strap built directly onto your watch at the atelier.

How does the bespoke strap process work for the B.Zero1?

I work by appointment only at <a href="/pages/casati-booking">Casati Milano</a>, Via XX Settembre 15. I take measurements directly from your 23mm case, then hand-craft the strap around the specific lugs of your watch. Every piece is made on the individual timepiece.

Which leather do you recommend for this model?

I prefer dusty rose Swift or honey Barenia — they speak naturally with the pink gold and steel without dampening the architectural elegance of the case. If you want something more assertive and sporty, Mississippi Alligator carries the weight of the design without fuss. It depends on how you wear it.

How long does a well-made strap last?

With a properly crafted strap, expect 4–6 years of daily wear before reconditioning. Leather ages, patinas, tells your story. If you care for it — wipe it occasionally, don't soak it needlessly — it lasts even longer. Routine maintenance costs far less than regret.

Was the B.Zero1 designed with a strap or bracelet?

Bulgari built the B.Zero1 with an integrated bracelet, inspired by the spirals of the Colosseum — it's part of the case, not an add-on. Choosing a strap means gently rethinking the watch, but with skilled hands you preserve the original intention. It's not compromise, it's dialogue with the design.

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