MB&F · Horological Machines

Strap for Horological Machine N°2 HM2 Ceramic & Titanium

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter59 mm
Reference20.DCTTL.B
FamilyHorological Machines
MovementMB&F caliber HM2 Jumping Hours, Jumping Minutes | Date | Moonphase
CaseTitanium, Ceramic

Spring bar

Swiss Standard universal spring bars

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

Straps for the Horological Machines 20.DCTTL.B

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Horological Machines 20.DCTTL.B, seen from the bench

The MB&F Horological Machines 20.DCTTL.B is a 59mm titanium and ceramic timepiece from the Horological Machines collection, featuring the MB&F caliber HM2 movement with jumping hours, jumping minutes, date, and moonphase display. The lug width measures exactly 20mm. This mechanical sculpture combines technical complexity with unconventional aesthetics, offering precision engineering through dozens of specialized components while maintaining lightweight construction via titanium case and ceramic accents.

Frequently asked questions

What is the lug width of the MB&F Horological Machines 20.DCTTL.B?

The MB&F 20.DCTTL.B features a 20mm lug width. This dimension is determined by the case architecture and is essential for strap compatibility. Always verify measurement with a digital calliper before purchasing an aftermarket strap.

Which strap is best suited for the MB&F 20.DCTTL.B?

We recommend an alligator strap with medium to large grain texture in dark tones (black, brown, antracite) for the 20.DCTTL.B. Alligator enhances technical sophistication without visually competing with the movement. Alternatively, vegetable-tanned calf leather or NATO straps offer contemporary approaches.

How do I change the strap on my MB&F Horological Machines?

To change the strap, use a spring bar tool to gently remove the spring bar (elastic pin) from one lug. Extract the old strap, align the new strap's lug hole with the spring bar, and reinsert the pin into the opposite lug. Motion should be smooth—never force.

Can I use an aftermarket strap on this watch?

Yes, any strap with 20mm lug width is compatible with the 20.DCTTL.B. We recommend premium watchmaking-grade leather (alligator, shell cordovan, calf) or robust synthetic materials like NATO and rubber. Always verify that the spring bar is easily removable.

How long does a leather strap last on a watch like the MB&F 20.DCTTL.B?

A quality leather strap's lifespan depends on usage and care. Premium alligator lasts 3-5 years with daily wear, developing natural patina. Vegetable-tanned calf has similar longevity. Rubber and NATO straps offer greater durability (5-7 years) but less aesthetic character. Protection from moisture naturally accelerates ageing.

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