Hublot · Big Bang

Strap for Big Bang Unico 45 Ceramic / Magic Gold

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

Integrated bracelet

The Hublot Big Bang 411.CM.1138.RX 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 diameter45 mm
Reference411.CM.1138.RX
FamilyBig Bang
MovementHublot caliber HUB1242 hours, minutes | date | Chronograph, Flyback, column wheel
Year2015
CaseCeramic, Magic Gold

Spring bar

Swiss Standard universal spring bars

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

The Big Bang 411.CM.1138.RX, seen from the bench

The Big Bang represents one of Hublot's main collections, characterized by contemporary design and modern technical solutions. The reference 411.CM.1138.RX is equipped with the HUB1242 caliber featuring hours, minutes, date, and flyback chronograph with column-wheel. The movement integrates advanced mechanisms for the management of chronograph complications in a manufacture configuration.

Frequently asked questions

Can a strap be fitted to the Hublot Big Bang 411.CM.1138.RX?

Not in the conventional sense. The bracelet is integrated into the case and the attachment system is proprietary: a standard strap simply has nothing to connect to. That is why every strap must be made to measure, directly on the watch, in the atelier.

How does the bespoke strap process 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. I bring the watch to the bench, take measurements directly from the case, and build the terminals by hand, one by one, to engage properly with the original release system. There is no other way to do it properly.

Which leather do I recommend for the Big Bang in Ceramic and Magic Gold?

I prefer vulcanised black Tuscan leather. The texture holds its own against the technical, bolted character of this case without looking out of place. As an alternative, satin-finish Mississippi Alligator creates a contrast of textures that works very well against the matte ceramic.

How long does a well-made strap last?

With regular care, a hand-crafted leather strap easily lasts five, even eight years. The key is keeping it away from water and letting it breathe: leather should not be worn on the same watch every single day. Over time it moulds to the wrist, and that is the best part.

What does 'Art of Fusion' actually mean on this watch?

Hublot combined two materials that technically should not work together: ceramic, extremely hard and matte, and Magic Gold, a gold hardened within the ceramic itself to make it scratch-resistant. The result is a case that shows far fewer signs of wear over the years than classic gold. It is a deliberate technical statement, not a decorative one.

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