PATEK PHILIPPE NAUTILUS REF. 5990/1A-001 CHRONOGRAPH DUAL TIME ZONE CALIBER CH 28-520 C FUS

INTRODUCTION
5990/1A - NAUTILUS 
SELF-WINDING

With the rounded octagonal shape of its bezel, the ingenious porthole construction of its case, and its horizontally embossed dial, the Nautilus has epitomized the elegant sports watch since 1976. Forty years later, it comprises a splendid collection of models for men and women. In steel, rose gold, white gold or two-tone combinations they accompany the most active lifestyles with incomparable class.

Mechanical self-winding movement. Caliber CH 28-520 C FUS. Chronograph. 60-minute counter. Sweep seconds hand (chronograph hand). Dual time zone mechanism indicating local and home time. Local and home day/night indication in apertures. Local date by hand. Dial: black gradated, gold applied hour markers with luminescent coating. Steel bracelet with Nautilus fold-over clasp. Case: steel. Screw-down crown. Sapphire-crystal case back. Water resistant to 120 m. Case diameter (10 - 4 o'clock): 40.5 mm. Height: 12.53 mm. 

CALIBER
CH 28-520 C FUS
SELF-WINDING
Chronograph with 60-minute counter. Dual time zone mechanism indicating local and home time. Date. Diameter: 31 mm. Height: 6.95 mm. Parts: 370. Jewels: 34. Power reserve: Min. 45 hours - max. 55 hours. Central rotor in 21K gold, unidirectional winding. Balance: Gyromax®. Vibrations/hour: 28 800 (4 Hz). Balance spring: Spiromax®. Hallmark: Patek Philippe Seal.
PATEK PHILIPPE SEAL