MB&F · Horological Machines

Strap for Horological Machine N°3 HM3 Starcruiser White Gold

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

Integrated bracelet

The MB&F Horological Machines 30.WTL.B 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 diameter47 mm
Reference30.WTL.B
FamilyHorological Machines
MovementMB&F caliber HM3 Hours, Minutes, Day / Night Indication | Date | Power reserve indicator
CaseTitanium, White Gold

Spring bar

Swiss Standard universal spring bars

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

The Horological Machines 30.WTL.B, seen from the bench

The Horological Machine HM3 represents MB&F's conceptual approach to time measurement through unconventional forms. The timepiece is powered by the in-house HM3 caliber with hour, minute, day/night, date and power reserve indications. The construction features a three-dimensional design that reinterprets the reading of time through differently positioned dials.

Frequently asked questions

Can a strap be mounted on an MB&F Horological Machines 30.WTL.B?

No, not a standard one. The lug attachment is proprietary and integrated into the case design; a conventional strap is not compatible. The solution is to rely on <a href="/pages/casati-booking">Casati Milano</a>, where specialist artisans create a bespoke strap built directly to the dimensions of your watch.

How does the bespoke strap process work at Casati Milano?

The atelier takes a precise measurement of the proprietary attachment during an in-studio appointment. The lug morphology and dimensions are measured, photographed, and documented. The strap is then handcrafted using the finest leathers, ensuring an impeccable fit and complete aesthetic coherence with the case.

Which leather suits the character of the MB&F Horological Machines 30.WTL.B?

Vegetable-tanned leathers with moderate grain work well with the sculptural geometry of the case. For raw titanium we recommend natural brown or deep black; for white gold, warm brown or dark grey. The patina that develops over time adds an organic quality to the mechanical rigour of the watch.

How long does a strap made by Casati Milano last?

A bespoke strap crafted with superior-quality leather and traditional techniques lasts far longer than an industrial strap. With proper care and periodic maintenance, it can accompany your watch for years, developing a fascinating patina that tells the story of its wearer.

Why is the HM3 considered a conceptual and not merely technical masterpiece?

The HM3 rejects predictable symmetry and embraces three-dimensional geometry where every case element is structural. Massimiliano Büsser conceived the watch as a multisensory experience: the sculptural form narrates internal complexity, transforming titanium and white gold into an aesthetic manifesto where mechanical rigour dialogues with design audacity.

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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Casati Milano · Via XX Settembre 15, Milan · by appointment only