Strap for Horological Machine 10th Anniversary HMX Blue

The lug width of the MB&F Horological Machines 56.STBL.B is 20 millimetres. This measurement is critical for strap compatibility and is determined by the three-dimensional architecture of the 46.80 mm case diameter. Measure the attachment by placing a rigid ruler perpendicular to the case lugs at their narrowest point.

There is no universally 'best' strap; it depends on intended use and aesthetic preference. For formal elegance, we recommend alligator with fine grain or vegetable-tanned calf leather. For a technical-sport aesthetic, a nylon NATO strap preserves the aerospace identity of the piece. For daily versatility, an FKM rubber strap offers comfort and durability. Bespoke consultation with Casati Milano can guide you to the optimal choice.

Changing the strap on the 56.STBL.B requires attention to the case geometry. Locate the lug shoulders and use a dedicated spring bar tool to compress and extract the elastic bars anchoring the strap. Due to the three-dimensional configuration, consulting a specialist watchmaker is advisable to prevent damage to the lugs. Casati Milano offers strap-changing service by appointment.

Yes, any strap with a 20mm lug width is mechanically compatible. However, the complex case geometry requires thoughtful selection: the strap must adapt to the three-dimensional curves without constraint. Milano Straps' artisanal straps are engineered to respect this complexity, whilst industrial standard straps may exhibit irregular tension. Preliminary consultation ensures the best match.

Leather strap durability depends on material quality, finish, and frequency of use. A high-quality alligator or calf strap typically lasts 3–5 years with moderate daily wear. Vegetable-tanned leather develops a natural patina that extends its visual lifespan beyond structural failure. Factors such as humidity, perspiration, and sunlight exposure accelerate ageing. A NATO or rubber strap, lacking organic fibres, may last 7–10 years. Regular maintenance (cleaning, conditioning) doubles longevity.