Breguet
Marine 5839BB/6D/9ZU/DD0D— lug 20mm

The Breguet Marine 5839BB/6D/9ZU/DD0D is fitted with a 20mm lug width at the case base. This measurement is verified with a digital caliper positioned between the two lower lugs: the free gap must be exactly 20.0mm. All straps with straight 20mm attachment are compatible with this reference.

For a white gold case with a guilloché silver dial, midnight blue or polished black alligator leather with fine grain is the most coherent choice: the subtle texture does not compete with the dial and the leather's sheen complements the gold finish. For sport and nautical use, a vulcanized rubber strap with leather inlay ensures durability and comfort without compromising aesthetics.

Replacement requires a 20mm spring bar tool and a dedicated lever or flat-tip opener for spring bar pins. The Marine's lugs are straight and accessible, but the white gold case requires maximum care to avoid scratches. It is recommended to entrust the replacement to a watchmaker or the Casati Milano atelier for safe service.

Yes. Any strap with straight 20mm attachment is dimensionally compatible. Milano Straps offers a selection of 20mm straps in alligator, box-calf, NATO, and rubber crafted by hand, with customizable lengths and buckles. The Marine's straight lugs require no curved profiles or special adapters.

Durability depends on material and use: quality alligator with reinforced stitching typically lasts 2–4 years with daily wear, developing a patina that enhances its appearance over time. Box-calf has a slightly shorter lifespan but ages with character. Casati Milano guarantees 18 months against manufacturing defects on all custom-made straps.