MB&F · Horological Machines

Strap for Horological Machine N°2 HM2 White Gold & 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.DWWTL.R
FamilyHorological Machines
MovementMB&F caliber HM2 jumping hours, jumping minutes | date | moonphase
CaseTitanium, White Gold

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.DWWTL.R

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Horological Machines 20.DWWTL.R, seen from the bench

The Horological Machine HM20 Displacement Watch Wristwatch Left by MB&F features the HM2 caliber with jumping hours and minutes, date and moon phases. The mechanical movement uses an unconventional display system for time reading. The 20.DWWTL.R reference is part of the brand's Horological Machines collection.

Frequently asked questions

What is the lug width of the MB&F Horological Machines 20.DWWTL.R?

The lug width (also termed strap width) of the MB&F Horological Machines 20.DWWTL.R is precisely 20mm. This dimension defines the distance between the two lugs on the case where the strap is fitted. It is essential to verify this measurement with a digital calliper before purchasing an aftermarket strap, as an incorrect width would compromise both aesthetics and mechanical compatibility.

What is the best strap for the MB&F Horological Machines 20.DWWTL.R?

The optimal strap depends on intended usage and aesthetic preference. For formal or refined daily wear, we recommend vegetable-tanned alligator, which develops a noble patina over time and engages discreetly with the titanium and white gold case. For those prioritising versatility and durability, a raw canvas NATO or high-density vulcanised rubber strap offers robustness and functionality. Premium calf leather remains an intermediate refined choice, ideal for those seeking fine grain and aesthetic uniformity.

How do you change the strap on the MB&F Horological Machines 20.DWWTL.R?

Strap replacement is accomplished by removing the spring bars that connect the strap to the case lugs. Use a dedicated spring bar tool, gently pushing the bar upward from beneath to release one end of the strap, then slide the strap free. Subsequently, insert the spring bars into the new strap (ensuring it is 20mm lug width) and affix both ends to the case attachment points until you hear an audible click. If uncertain, consult a professional watchmaker.

Is the MB&F Horological Machines 20.DWWTL.R compatible with quality aftermarket straps?

Yes, the MB&F Horological Machines 20.DWWTL.R is fully compatible with premium aftermarket straps, provided they are manufactured with a 20mm lug width. Specialist manufacturers such as Milano Straps produce straps in alligator, calf, NATO, and technical rubber, crafted with meticulous attention to detail and finishing, ensuring mechanical compatibility and aesthetic coherence with the watch's radical design philosophy. Avoid generic or budget-grade straps, which would diminish the value and visual impact of the timepiece.

What is the typical lifespan of a leather strap on the MB&F Horological Machines 20.DWWTL.R?

The durability of a premium leather strap (vegetable-tanned alligator, superior calf leather) ranges from 3 to 7 years, contingent upon frequency of use and environmental conditions (humidity, perspiration, solar exposure). Vegetable-tanned leather develops an increasingly distinguished patina with wear; calf leather maintains elasticity over a longer duration. To extend serviceable life, we recommend alternating between straps, avoiding prolonged water immersion, and periodically applying a natural leather conditioner. Synthetic rubber or canvas NATO straps offer superior longevity, from 5 to 10 years, for those prioritising durability and practical functionality.

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