MB&F · Legacy Machines

Strap for Legacy Machine Split Escapement Evo Beverly Hills

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

Lug width20 mm
Case diameter44 mm
Reference04.TR.BLB
FamilyLegacy Machines
MovementMB&F caliber LM2 Hours, Minutes
CaseTitanium

Spring bar

Swiss Standard universal spring bars

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

Straps for the Legacy Machines 04.TR.BLB

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Legacy Machines 04.TR.BLB, seen from the bench

The MB&F Legacy Machines 04.TR.BLB is a 44 mm titanium grade 5 sports watch featuring the proprietary MB&F caliber LM2 movement with hours and minutes display. Part of the Legacy Machines series initiated in 2009, this model showcases a vertical architecture with a triple flying tourbillon visible under a domed sapphire crystal. The 20 mm lug width allows compatibility with various artisanal straps while maintaining case proportions.

Frequently asked questions

What is the exact lug width of the MB&F Legacy Machines 04.TR.BLB?

The lug width of the MB&F Legacy Machines 04.TR.BLB is 20 millimetres. This dimension offers considerable versatility when pairing with artisanal straps. To verify the measurement with precision, use a digital calliper positioned on the internal attachment pins at the widest point of the lugs.

What is the best strap to pair with the MB&F Legacy Machines 04.TR.BLB?

The optimal strap depends on intended usage and aesthetic preference. Natural anthracite alligator amplifies the futuristic character of the titanium case. Vegetable-tanned calf leather offers elegant ageing and patina development over time. A ballistic NATO strap emphasises the engineering DNA of the piece. For summer wear, vulcanised FKM rubber with diagonal grooves provides superior grip and functionality.

How do you change the strap on the MB&F Legacy Machines 04.TR.BLB?

Strap replacement is executed via removable spring bars (attachment pins). Use a spring bar tool to gently compress the internal pin, extracting one end of the strap first, then the other. Position the new strap by aligning the lug holes with the pins, and reinsert the spring bars until they click into place. Verify that the strap is firmly secured before wearing the timepiece.

Which aftermarket straps are compatible with the 04.TR.BLB?

The MB&F Legacy Machines 04.TR.BLB is compatible with any strap featuring a 20mm lug width, regardless of manufacturer. Milano Straps offers a dedicated collection of artisanal straps in this dimension, crafted from noble leathers (alligatore, calf, shell cordovan), technical fabrics (NATO), and synthetic rubbers (FKM). Always verify that the strap possesses adequate thickness for the case's spring bars.

What is the typical lifespan of a leather strap on a daily-wear timepiece?

Durability depends on leather quality, tanning method (vegetable tanning offers superior robustness), climate conditions, and frequency of use. A calf or alligator strap with vegetable tanning, worn daily, maintains excellent resistance for 4-7 years. Natural ageing of the leather is desirable: the patina developed through time confers character and authenticity. Constant exposure to humidity, chlorine, or marine salt reduces longevity. Regular maintenance with specialist creams extends strap lifespan considerably.

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