Patek Philippe Nautilus Travel Time Chronograph

Philip Barat, head of development at Patek Philippe, presents the Ref. 5990/1A Nautilus Travel Time Chronograph launched in 2014.
After a historic précis on complicated Nautilus timepieces since 2006, he explains in detail the features and operation of the Nautilus Chronograph with the time-zone mechanism. And he vividly recalls the technical challenges involved in creating the movement and case of this masculine timepiece with its genuinely convenient complications.
5990/1
NAUTILUS TRAVEL TIME CHRONOGRAPH
SELF-WINDING MECHANICAL MOVEMENT
CALIBER CH 28-520 C FUS
60-minute counter. Dual time zone mechanism indicating local and home time. Local and home day/night indication in apertures. Local date by hand. Sweep seconds hand (chronograph hand).
Dial: black gradated, gold applied hour markers with luminescent coating. Case: steel. Screwdown crown. Sapphire-crystal case back. Water resistant to 120 m. Diameter (10 - 4 o’clock): 40.5 mm. Height: 12.53 mm.
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