Technical Archive

Breguet
Marine 5557BB/YS/9WV— lug 20mm

Breguet Marine 5557BB/YS/9WV: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Marine Hora Mundi 5557 White Gold / Blue / Alligator

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

Breguet 5557BB/YS/9WV
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

5557BB/YS/9WV

Movement

Breguet caliber 77F1 Day / Night Indication, Hours, Minutes, Seconds, World Time | Date

The Heritage

The Breguet Marine 5557 in white gold features a 43.90mm case housing the Breguet Caliber 77F1 automatic movement with world time, date, and day/night indication. The white gold case with guilloché dial and fluted bezel reflects the brand's marine chronometer heritage since 1815. The watch comes with integrated white gold bracelet and requires a 20mm curved-end strap for proper fit and transition at the horns.

FAQ

What is the lug width of the Breguet Marine 5557BB/YS/9WV?

The Breguet Marine 5557BB/YS/9WV has a lug width of 20mm. This is a standard size that allows for a good selection of aftermarket straps, but it is essential to verify that the top end of the strap has a curved end profile compatible with the characteristic curvature of the lugs on this white gold model.

What is the best strap for the Breguet Marine 5557BB/YS/9WV?

For the Marine 5557BB/YS/9WV in white gold, alligator leather in a polished deep blue or navy finish represents the most coherent choice with the marine vocation of the piece and the preciousness of the metal. Alternatively, a black box calf offers formal rigor, while vulcanized rubber emphasizes the model's tool-watch origins with a deliberate textural contrast between matte rubber and a polished case.

How do you change the strap on the Breguet Marine 5557BB/YS/9WV?

To replace the strap on the Breguet Marine 5557BB/YS/9WV, you must remove the spring bars using a dedicated forked-tip tool, taking care not to scratch the white gold case. Given the curvature of the lugs, it is recommended to entrust the operation to an experienced watchmaker or to the Casati Milano atelier, where the installation is performed with professional tools without risk of damaging the metal surface.

Are there aftermarket straps compatible with the Breguet Marine 5557BB/YS/9WV?

Yes, there are high-quality aftermarket straps compatible with the Breguet Marine 5557BB/YS/9WV. The critical parameter is the 20mm lug width and the presence of a curved end with the correct radius to fit the curvature of the case lugs. On milanostraps.it, a selection of 20mm artisanal straps is available, with the possibility of bespoke customization at the Casati Milano atelier for a tailored fit.

How long does a leather strap last on the Breguet Marine 5557BB/YS/9WV?

The lifespan of a leather strap depends on the material, care, and frequency of use. A quality alligator strap, properly treated and kept away from water and prolonged perspiration, maintains structural and aesthetic integrity for 2-4 years of regular use. Box calf, more resistant to moisture, develops a patina over time that enhances its character. Casati Milano offers an 18-month warranty against manufacturing defects on all artisanal straps.

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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By appointment only · Milan

The atelier's website: casatimilano.com