MB&F · Legacy Machines

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

Integrated bracelet

The MB&F Legacy Machines 04.RL.W5 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 diameter44 mm
Reference04.RL.W5
FamilyLegacy Machines
MovementMB&F caliber LM2 hours, minutes
Year2020
CaseRed 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 04.RL.W5, seen from the bench

The MB&F Legacy Machines 04.RL.W5 is an architectural watchmaking masterpiece powered by the MB&F caliber LM2 movement with 2.5 Hz balance frequency. The 44 mm red gold case features a suspended balance wheel visible through a double curved anti-reflective sapphire crystal, water-resistant to 30 meters. The 20 mm lug width is a distinctive characteristic of this model, offering precise proportions between case and strap attachment.

Frequently asked questions

What is the lug width of the MB&F Legacy Machines 04.RL.W5?

The MB&F Legacy Machines 04.RL.W5 features a lug width of 20mm. This is an unconventional width that requires strap-specific specifications, as 22mm straps will not fit correctly on the case lugs. It is essential to measure the perpendicular distance between the inner edges of the lugs to confirm compatibility with any aftermarket strap.

What is the best strap for the Legacy Machines 04.RL.W5?

The optimal strap choice for the Legacy Machines 04 depends on your usage patterns and aesthetic preferences. For a formal approach, alligator in chocolate brown or anthracite grey offers sophisticated tonal contrast with the rose gold case. For a more sustainable and conscious choice, vegetable-tanned leather provides a patina that develops naturally over time. A burgundy shell cordovan strap creates a warm and coherent chromatic dialogue with the metal. Contemporary design enthusiasts may consider a light grey NATO, which enhances the architectural vocation of the model.

How do you change the strap on an MB&F Legacy Machines watch?

To replace the strap, use a spring bar removal tool to gently depress the internal spring of the lug end, freeing the pin. Apply uniform and controlled pressure to avoid damage to the case. Once the lug is removed, align the new strap with the lugs and reposition the pin, ensuring that the return spring is correctly engaged. Verify that the strap is firmly secured before wearing the watch. If you are uncertain about the procedure, consult a professional watchmaker.

Which aftermarket straps are compatible with the MB&F Legacy Machines 04.RL.W5?

Any strap designed for a 20mm lug width is compatible with the Legacy Machines 04.RL.W5. Milano Straps offers a specialised collection of straps in alligator, Italian leather, shell cordovan, NATO and FKM rubber, all available in 20mm width. The straps are ready for shipment and customisable according to your chromatic and material preferences. Always verify that the strap is explicitly declared as 20mm to avoid compatibility issues.

How long does a leather strap last on a watch like the Legacy Machines 04?

The durability of a leather strap depends on construction quality, tanning methodology and usage frequency. A high-quality alligator or full-grain Italian leather strap with vegetable tanning can last 5 to 10 years of regular use. Continuous exposure to moisture, direct sunlight and perspiration accelerates wear. A shell cordovan strap tends to be more durable due to its semi-rigid nature. Regular maintenance, such as conditioning with leather-specific products, significantly prolongs strap life. When leather begins to show cracks or loss of elasticity, replacement is warranted.

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