Patek Philippe
Nautilus 5711/1A-010

The Nautilus attachment is an integral part of the case design and does not accept a standard strap with conventional spring bars: the geometry is proprietary and requires a dedicated construction. A strap is absolutely possible, but it must be built to measure on the client's specific watch. This is precisely the work carried out by the <a href="/pages/casati-booking">Casati Milano</a> atelier, where every measurement is taken directly from the original before production begins.

The starting point is always the physical watch: at the Casati Milano atelier, the master craftsman takes a direct measurement of every dimension and curve of the Nautilus's proprietary attachment. Only from these real measurements is the strap constructed, ensuring a precise fit to the case and a visual transition consistent with Genta's original design. The client chooses leather, colour, stitching style and buckle in the atelier, taking an active role in the creative process.

The Nautilus has a dual nature: sporting in its vocation, refined in its execution. Alligator belly or hornback, with its regular grain and natural lustre, enhances the polished surfaces of the steel case for important occasions. For everyday wear, box calf offers a tight grain and a patina that matures over time, complementing the watch's versatility without overshadowing its identity.

A strap built with first-grade leathers, double-stitched with silk or nylon thread and carefully finished can accompany a watch for many years, developing a personal patina over time that deepens its character. Longevity also depends on the choice of buckle: a butterfly deployant reduces stress on the leather at the hole, extending its useful life. Periodic care — a light leather conditioning — does the rest.

The Nautilus was the first luxury sports watch to challenge the idea that a water-resistant steel watch had to be a utilitarian object. When Gérald Genta presented it in 1976, its steel price exceeded that of many gold models: a deliberate provocation that redefined the perceived value of materials in watchmaking. The 5711/1A-010, with its horizontally textured blue dial, remained in production until 2021, becoming one of the most sought-after references among international collectors.