Patek Philippe Nautilus Ref. 5990/1A – 41mm Stainless Steel with Sunburst Blue-to-Black Gradient Dial

The Patek Philippe Nautilus 5990/1A is one of the most technically advanced and sought-after steel models in the Nautilus lineage, uniting sport elegance with sophisticated mechanical engineering.

Crafted entirely from stainless steel, the 40.5–41mm case showcases the collection’s iconic rounded octagonal bezel and refined satin-brushed surfaces. The integrated bracelet enhances the fluid, architectural design that has defined the Nautilus since 1976.

Its dial — a sunburst blue center fading into a deep black gradient rim — is one of the most captivating executions in the modern Nautilus family. Horizontal embossing, luminous indices, and contrasting subdials provide exceptional legibility while preserving the watch’s understated sophistication.

Inside beats the self-winding Calibre CH 28-520 C FUS, a highly complex movement combining:

• Flyback chronograph

• Dual-time (Travel Time) mechanism

• Day/Night indicators for both home & local time

• Analog date synchronized with local time

This fusion of utility and refinement makes the 5990/1A one of the most versatile luxury steel watches in the world — a seamless companion for aviation, travel, business, or leisure.