MB&F · Horological Machines

Strap for Horological Machine N°3 HM3 Final Edition

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

Integrated bracelet

The MB&F Horological Machines 35.WBTL.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
Reference35.WBTL.B
FamilyHorological Machines
MovementMB&F caliber HM3 hours, minutes, day / Night Indication | date | power reserve indicator
Year2015
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 35.WBTL.B, seen from the bench

The HM3 Horological Machine represents MB&F's unconventional approach to contemporary horology. The timepiece features the in-house HM3 calibre with indications for hours, minutes, day/night and power reserve. The reference 35.WBTL.B showcases a three-dimensional construction that integrates the time functions in a distinctive architectural configuration.

Frequently asked questions

Can a standard strap be fitted to the MB&F Horological Machines 35.WBTL.B?

No, the bracelet is integrated into the case. The attachment is non-conventional — a standard strap will not fit. What I do in the atelier is build the strap directly onto the unique geometry of this machine, working leather and attachments as part of the object itself.

How does the bespoke strap process work for this model?

You come to <a href="/pages/casati-booking">Casati Milano</a>, by appointment. I take measurements directly from the case — angles, depths, thickness. Then I construct the strap from scratch, on the watch, so it embraces its architecture without compromise.

Which leather would you recommend for the MB&F 35.WBTL.B?

Mississippi alligator with extra-large scales. This watch is three-dimensional sculpture, sporty and intense — it needs leather that withstands time and geometry without flattening. Alligator ages with character, the scales remain prominent.

How long does a well-made strap last?

It depends on use and care. A well-constructed strap lasts 5–8 years of daily wear. Good leather ages — it becomes softer, more alive. If you treat it with respect, over time it tells a story.

Why can't straps be standardised on the MB&F Horological Machines 35.WBTL.B?

Because the case is radical — titanium and white gold, geometry that doesn't follow classical watchmaking rules. Every lug is unique, every angle is intentional. Standardising would betray the concept. That's why I build it by hand, once only, on that specific watch.

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