Technical Archive

Breguet
Classique 5727BB/12/9ZU— lug 18mm

Breguet Classique 5727BB/12/9ZU: 18mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Classique Hora Mundi 5727 White Gold / White

Artisanal Note

"This model requires a precise 18mm lug width to preserve the original sartorial balance."

Technical Specifications

Breguet 5727BB/12/9ZU
Lug Width
18 mm

The essential strap measurement.

Browse 18mm straps →
Reference

5727BB/12/9ZU

Movement

Breguet caliber 77F0 Hours, Minutes, Seconds, Additional 24 Hour Hand (adjustable), Day / Night Indication | Date

The Heritage

The Breguet Classique 5727BB/12/9ZU pairs a 43mm white gold case with a sunburst guilloche dial, applied Roman numerals, and blued pomme hands. The in-house caliber 77F0 automatic movement features a micro-rotor, hand-finishing, and dual time-zone display with AM/PM indicator. Water resistant to 30 meters, it features sapphire crystals front and back. The 18mm lug width accommodates compatible third-party straps.

FAQ

What is the lug width of the Breguet Classique 5727BB/12/9ZU?

The Breguet Classique 5727BB/12/9ZU is fitted with 18mm width lugs at the case attachment. This is the measurement to indicate when searching for a compatible aftermarket strap. The width at the loop and buckle is usually 16mm in straps with standard tapering.

What is the best strap for the Breguet Classique 5727BB/12/9ZU?

For a white gold case with a guilloche dial, a matte Mississippiensis alligator strap is the most coherent choice from an aesthetic standpoint. The square grain harmonizes with the artisanal craftsmanship of the dial. Alternatively, a dark night blue or deep burgundy box calf grain enhances the characteristic burnished pomme hands typical of Breguet.

How do you change the strap on a Breguet Classique 5727BB/12/9ZU?

Strap replacement is done via the spring bars that connect the strap to the case lugs. A dedicated spring bar tool or a very thin flat-blade screwdriver is used to compress the springs and remove the bars. On a white gold watch of this value, it is advisable to entrust the task to a watchmaker or the Casati Milano atelier to avoid scratches on the lugs.

Are there aftermarket straps compatible with the Breguet Classique 5727BB/12/9ZU?

Yes. Any strap with an 18mm lug width and standard spring bars is technically compatible. Milano Straps offers a selection of artisanal 18mm straps in various materials and colors, all crafted with finishes suitable for a high horology watch. You can choose online or commission a custom strap at the Casati Milano atelier.

How long does a leather strap last on a Breguet Classique 5727BB/12/9ZU?

Durability depends on the material and intensity of use. A quality alligator strap, worn in rotation with other straps, can last 3 to 5 years while maintaining an elegant patina. Calf leather tends to wear sooner, especially with sweat or humidity exposure. Casati Milano straps are covered by an 18-month warranty against manufacturing defects and benefit from premium hides with high-quality tanning.

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