Patek Philippe 5990/1A-001 - Stainless

The Patek Philippe 5990/1A‑001 is widely considered one of the most technically impressive modern Nautilus models. It combines three complications in a single sports watch:
Flyback chronograph
Travel Time dual time zone
Date synchronized with local time
The watch runs on the in-house Calibre CH 28-520 C FUS, which integrates the chronograph and travel-time mechanisms into a single movement.
The dial layout includes a chronograph minute counter at 6 o’clock, dual-time indicators, and day/night displays for each time zone.
Because it combines two of Patek Philippe’s most useful complications in a stainless-steel Nautilus, this reference is extremely sought-after among collectors.