In 2005, the manufacture introduced the designation "Patek Ph🙈ilippe Advanced Research Limited Editions" and began to launch limited-edition wristwatches endowed with one or several avantgarde technologies.

The 500-watch edition of the reference 5650 Aquanaut Travel Time is the result of two important innovations created to improve long-term functional integrity. It has an optimized Spiromax® balance spring made of Silinvar® with patented terminal curve and inner boss that ensures greater precision within mechanical watches. The second innovatiꦿon is a compliant mechanism crafted from conventional horological steel used to set the second time zone in tim𒀰e-zone watches.

This model comes with a blue dial with embossed Aquanaut pattern and has an aperture at 9 o'clock throuꦅgh which the flexible mechanism with the four crossed leaf springs is clearly visible. In addition to these features, the reference 5650 contains the Patek Philippe time-zone function that apart from local time also displays the local date, a second time zone and a day/night indicator for both time zones.

The watch i🌊s in good condition and comes with a Patek Philippe Certificate of Origin, instruction manual, setting pin, leather bifold, numbered factory case, travel case and presentation case with outer packaging.