MB&F · Legacy Machines

Strap for Legacy Machine FlyingT Baguette

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

Integrated bracelet

The MB&F Legacy Machines 05.WSL.B1 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 diameter39 mm
Reference05.WSL.B1
FamilyLegacy Machines
MovementMB&F caliber LM FlyingT hours, minutes | tourbillon escapement
Year2019
CaseWhite Gold

Spring bar

Swiss Standard universal spring bars

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

The Legacy Machines 05.WSL.B1, seen from the bench

The MB&F Legacy Machines 05.WSL.B1 is a white gold case watch with a 38.5mm diameter and 20mm lug width, featuring the MB&F caliber LM FlyingT movement. The flying tourbillon eliminates the traditional upper bridge, exposing the regulation system and showcasing the mechanical complexity through multiple viewing angles. The movement operates with hours, minutes, and flying tourbillon, maintaining exceptional chronometric performance regardless of wrist orientation.

Frequently asked questions

What is the lug width of the MB&F Legacy Machines 05.WSL.B1?

The lug width of the MB&F Legacy Machines 05.WSL.B1 is 20mm. It is measured between the two attachment pins on the case. It is essential to verify this dimension before purchasing a replacement strap, as even a slight variation compromises proper fitment.

Which strap is recommended for the MB&F Legacy Machines 05.WSL.B1?

For this haute horlogerie timepiece, we recommend alligator for aesthetic restraint, calf leather with vegetable tanning for a patina that evolves over time, or satin-finished NATO for those seeking daily practicality. We advise against synthetic materials: the MB&F deserves authentic and premium leathers.

How do I change the strap on the MB&F Legacy Machines 05.WSL.B1?

The change requires a spring bar tool (a small specific instrument). Place the watch on a soft surface, position the tool beneath the attachment pin, apply gentle downward pressure to release the internal spring, and slide the pin out of the lug. Repeat on the other side. If in doubt, contact Atelier Casati Milano for professional replacement.

Can I use a compatible aftermarket strap with the MB&F Legacy Machines 05.WSL.B1?

Yes, provided it is certified 20mm and made from quality materials (full-grain leather, robust NATO, technical FKM rubber). Avoid inexpensive or synthetic products: an MB&F piece deserves straps that age with dignity and maintain their finishing quality.

How long does a leather strap last on the MB&F Legacy Machines 05.WSL.B1?

A quality leather strap (alligator, vegetable-tanned calf) lasts 3-5 years with responsible daily wear, developing patina and character. Longevity depends on sun exposure, humidity, and frequency of wear. A NATO strap lasts longer (5-7 years) thanks to cotton robustness, whilst FKM rubber has similar durability to NATO if not exposed to extreme temperatures.

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