Two pushers where the hinge was, and a chronograph that gave up its hour counter.
Patek Philippe introduced the 5990/1A at Baselworld in 2014 to replace the steel 5980/1A. It keeps the 5980's flyback chronograph and adds a travel-time display: on the left flank, where the Nautilus case has a hinge, two pushers now move local time forward at eight o'clock and back at ten, an hour at a time. The date is a hand at twelve that follows local time, and two apertures marked LOCAL and HOME show day or night in each place. Patek's travel-time mechanism goes back to a 1959 patent and does not disturb the going train when the time zone changes.
To make room, the chronograph counter at six became a 60-minute counter, without the 5980's hour count. The movement, CH 28-520 C FUS, has 47 more parts than the 5980's calibre and is only 0.3 mm thicker, and it introduced a Spiromax balance spring in place of the Breguet spring.
There are two dials, by suffix. The 5990/1A-001 of 2014 has a black dial with a slight gradation, in our photograph. In 2022 the -011 replaced it with a sunburst blue-grey dial with a black-gradient rim. Tell us which one you mean, or that either will do; availability and timing are confirmed for your request before you commit to anything.
- Flyback chronograph with a 60-minute counter
- Travel time: local-time pushers at eight and ten, date following local time
- Two dials by suffix: black (-001, 2014) and blue-grey (-011, 2022)
- Sourced to your brief; availability confirmed for each request