Strap for Tourbillon Perpetual Calendar 3797 Platinum / Silver

The Breguet Classique Complications 3797PT/1E/9WU is fitted with a strap featuring an 18 mm lug width. This is the internal measurement between the two lugs of the platinum case and determines the correct width of the replacement strap in the upper part, the section that contacts the case.

For this platinum model with a guilloché dial, the fine-grained mississippiensis alligator strap is the most aesthetically coherent choice. Polished box calf represents the formal alternative for those preferring an even more essential profile. In both cases, the recommended color is polished black or slate blue, to match the cool tone of the platinum.

Strap replacement requires a spring bar tool to remove the spring bars from the platinum case lugs. It is recommended to work on a soft surface to protect the guilloché dial and case. If in doubt, it is preferable to rely on a qualified watchmaker or the Casati Milano atelier, where the operation is performed without risk of scratching the case.

Yes. Aftermarket 18 mm straps compatible with the Breguet Classique Complications 3797PT/1E/9WU are available on milanostraps.it in the 18mm strap section. It is important to verify the attachment profile — straight or curved — to ensure proper fit to the geometry of the Classique case. Casati Milano also produces custom bespoke straps made to measure for this specific reference.

The lifespan of a leather strap depends on the type of leather, frequency of use, and exposure to sweat and humidity. A quality alligator strap on a watch worn daily lasts on average 18-24 months before the patina begins to show structural wear at the keeper. Box calf tends to soften sooner in the bend areas. Casati Milano offers an 18-month warranty on manufacturing defects for all straps made in the atelier.