Strap for Nautilus 5724 White Gold / Blue

The Nautilus lug attachment is not a conventional spring-bar fitting: it is a structural extension of the case itself, designed by Genta as an organic part of the overall form. An off-the-shelf aftermarket strap in a standard size will not sit correctly on this model. A strap is entirely achievable, however — built to measure on the watch by <a href="/pages/casati-booking">Casati Milano</a>: the craftsman records the exact dimensions of the attachment directly from the client's own piece and constructs the strap around that specific geometry.

During the atelier session, the craftsman places the watch against measuring instruments to capture the lug curvature, attachment angle and internal profile. A supporting core is then built to replicate that exact case geometry. The strap is subsequently worked by hand around this structure, ensuring a fit and visual continuity identical to the original bracelet.

White gold has a cool, dry luminosity that pairs most naturally with leathers of compact grain. Box calf, with its smooth surface and the patina it develops over time, is the most sympathetic match for this reference. For those wishing to emphasise the technical complexity of the movement, a matte porosus alligator offers a regular scale texture that echoes the dial's graphic rhythm without overwhelming the case.

A strap constructed from selected leather with hand-sewn stitching on a technical-material core can accompany the watch for many years, developing a personal patina that adds character over time. Longevity depends on the leather chosen, maintenance — avoiding prolonged contact with water and perspiration — and daily use. A well-tended box calf improves with age; alligator demands more care but retains its structure for a considerable time.

Calibre 240 PS IRM C LU is a self-winding movement with a 22-carat gold micro-rotor, presenting four complications on the dial — small seconds, date, moon phases and power-reserve indicator — with an orderly yet rich layout. This mechanical depth calls for an equally considered strap: not a mere complement, but a piece that holds its own against the complexity carried on the wrist.