Patek Philippe Nautilus

The Patek Philippe Nautilus Ref. 5990/1A-001 is one of the most versatile and technically advanced references within the Nautilus collection, combining dual time-zone functionality with a flyback chronograph in a single, beautifully balanced design. Crafted entirely from stainless steel, the 5990/1A-001 features a horizontally embossed black-gray gradient dial that perfectly complements the iconic porthole-shaped case and integrated bracelet. Two pushers on the left side of the case control the local hour hand, allowing instant time-zone adjustment while maintaining the travel and home time displays. Powered by the self-winding Calibre CH 28-520 C FUS, it exemplifies Patek Philippe’s mastery of mechanical complexity packaged in timeless Nautilus form.

Specifications

Reference: 5990/1A-001

Collection: Nautilus

Case Material: Stainless steel

Case Diameter: 40.5 mm

Case Thickness: ~12.5 mm

Bezel: Rounded octagonal stainless-steel bezel with polished and satin-brushed finish

Crystal: Scratch-resistant sapphire front and display caseback

Dial: Black-gray gradient horizontally embossed dial with luminous white-gold hour markers

Hands: White-gold hands with Super-LumiNova luminous fill

Movement: Patek Philippe Calibre CH 28-520 C FUS automatic
 • Frequency – 28,800 vph (4 Hz)
 • Power Reserve – ~45–55 hours
 • Functions – Hours, minutes, seconds, flyback chronograph, dual time-zone with day/night indicators, date linked to local time
 • Finishing – Hand-decorated bridges, circular Geneva striping, 21k gold rotor engraved with the Calatrava cross

Bracelet: Integrated stainless-steel bracelet with folding clasp

Water Resistance: 120 m / 12 ATM