The Patek Philippe Nautilus 5990/1A-011 is one of the most technically versatile Nautilus models, combining three major complications into a single sports watch: a flyback chronograph, dual time (Travel Time), and date.

It is a rare example of a complicated Patek Philippe in stainless steel, designed with frequent travelers in mind while retaining the iconic Gérald Genta Nautilus design.

Key Features

• Case & Construction
• Material: Stainless steel
• Diameter: 40.5 mm
• Thickness: ~12.5 mm
• Water resistance: 30 m
• Caseback: Sapphire display back
• Signature rounded-octagonal Nautilus case
• Combination of satin-brushed and polished finishes
• Integrated steel bracelet with fold-over clasp

Dial & Design

• Color: Blue sunburst with black-gradient rim
• Texture: Horizontal embossing (Nautilus signature)
• Markers: White gold with luminescent coating

Display Layout

• Dual time zone (Travel Time)
• Solid hand = local time
• Skeleton hand = home time
• Day/Night indicators for both time zones
• Date subdial at 12 o’clock (linked to local time)
• Chronograph monocounter at 6 o’clock (60-minute)

The dial balances multiple complications while remaining highly legible and symmetrical.

Movement

• Caliber: CH 28-520 C FUS (in-house)
• Type: Automatic (self-winding)
• Power reserve: ~45–55 hours
• Frequency: 28,800 vph

Functions

• Flyback chronograph
• Central chronograph seconds
• 60-minute counter
• Dual time (local + home)
• Date synchronized with local time
• Day/night indicators

Technical Highlights

• Vertical clutch chronograph (smooth operation)
• Gyromax balance & Spiromax hairspring
• 21k gold rotor
• ~370 components

This movement is engineered to integrate travel and chronograph functions seamlessly, a rare combination in luxury sports watches.

Travel Time Function (Key Innovation)

• Pushers on the left side of the case adjust local hour forward/backward
• Independent home time display
• Ideal for frequent travelers

This system allows quick time zone adjustment without stopping the watch.

Bracelet

• Material: Stainless steel
• Type: Integrated Nautilus bracelet
• Clasp: Fold-over with adjustment system

Known for exceptional comfort and finishing quality.