Technical Archive

MB&F
Horological Machines 60.SPL.B

MB&F Horological Machines 60.SPL.B: strap made to measure on the watch at the Casati Milano atelier, by appointment.

Horological Machine N°6 Space Pirate HM6-SV Platinum

Technical Specifications

MB&F 60.SPL.B
Reference

60.SPL.B

Movement

MB&F caliber HM6 Hours, Minutes | Tourbillon Escapement

The Heritage

The Horological Machine No. 6 represents one of MB&F's contemporary creations in the field of mechanical art watches. The timepiece is equipped with the HM6 caliber with a tourbillon regulator and hour and minute indications. The 60.SPL.B reference features a three-dimensional construction that integrates the movement into an unconventional configuration.
Made to Measure

The strap for this watch is made to measure

On the MB&F Horological Machines 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 you fit a standard strap to the MB&F Horological Machines 60.SPL.B?

No, this model does not use conventional straight bars: the lug is an integral part of the case design and follows a proprietary geometry. The only correct solution is a strap built to measure, directly on the watch, by <a href="/pages/casati-booking">Casati Milano</a>, by appointment only.

How exactly does the bespoke strap construction process work?

Casati Milano's atelier begins with direct measurement of the watch: the exact dimensions of the proprietary lug, the shape of the contact points, and the angle of wrap around the wrist are recorded with precision. The strap is then constructed by hand on the watch itself, ensuring perfect adherence to the case geometry without compromise.

Which type of leather best suits the character of the MB&F Horological Machines 60.SPL.B?

Given the visionary and contemporary nature of the piece, leathers with pronounced grain (suede, vegetable-tanned nubuck) create a fascinating material contrast with the platinum. Crocodile and alligator amplify the sculptural character; minimalist box calf in grey, black or white tones creates chromatic harmony with the case.

How long does a well-made artisanal strap last?

A strap crafted according to sartorial craftsmanship principles, using superior-quality leathers and traditional stitching techniques, lasts many years. Longevity depends on use, maintenance, and the type of leather chosen; vegetable tanning and exotics age gracefully, developing patina and character over time.

Why doesn't the MB&F Horological Machines 60.SPL.B have a standard strap lug?

Maximilian Büsser conceived the 60.SPL.B as a three-dimensional sculpture where every constructive element obeys a rigorous logic of proportion and visual flow. The lug is not a secondary detail, but a natural extension of the case's form; for this reason it requires a bespoke strap that fully respects the original intention.