The first Nautilus ever fitted with a chronograph. It runs the CH 28-520, Patek Philippe's first self-winding chronograph movement developed and manufactured in-house — a flyback design with a column wheel and vertical clutch. Elapsed time is read from a single co-axial subdial at six o'clock combining the sixty-minute and twelve-hour counters, which is why the dial carries no conventional pair of chronograph registers.
Reference record
Production
2006–2021
Model
Nautilus Chronograph
Case material
Stainless Steel
Case size
40.5mm
Movement
Automatic
Calibre
Cal. CH 28-520 C
Dial colours
Blue
Market value band
$140k – $200k
Timeline
2006Introduced as the first Nautilus with a chronograph, carrying the in-house CH 28-520
Notable
—The CH 28-520 C is a flyback chronograph with a column wheel and vertical clutch, and roughly 55 hours of power reserve.
What the specification implies
—This reference reads elapsed minutes and hours from one co-axial subdial at six o'clock. It was not made with separate minute and hour registers.
—The CH 28-520 is self-winding; no hand-wound execution of this reference exists.
—The movement is not exclusive to the Nautilus — the same family appeared in the reference 5960 annual calendar chronograph.
Common questions
When was the Patek Philippe 5980/1A produced?
The 5980/1A was produced from 2006 to 2021.
What movement does the Patek Philippe 5980/1A use?
The Patek Philippe 5980/1A runs the Cal. CH 28-520 C, an automatic movement.
How do I check a Patek Philippe 5980/1A with Watch Safe?
Look up the watch's serial number in the Watch Safe registry to see whether a record exists or a theft flag is attached. A registry search identifies records for a specific serial; it does not authenticate the watch. Authentication is performed in person by an independent expert authenticator, and Watch Safe records and publishes the result.