Released in 2012, the Patek Philippe Aquanaut Travel Time has proven to be wildly successful as Patek broadens the scope of their sportiest model and fill it with real-world features. The very first Aquanaut to feature a complication beyond just the date, the ref. 5164 houses a list of practical functions which it has its automatic cal. 324 S C FUS movement to thank. Featuring a second-time zone displayed through its skeletonised second-hour hand, the cal. 324 S C FUS is perhaps the epitome of Patek's incredibly intuitive design. Featuring a pair of AM/PM apertures positioned at 3 and 9 o’clock on the dial, the Aquanaut ref. 5164 can quickly provide its wearer with their local and home time, alongside their AM/PM status. A stunningly symmetrical layout on one of Patek's most iconic modern designs, the ref. 5164 Travel Time is perhaps the ultimate Aquanaut thanks to its sports-orientated design and impressive utility as a functional jet-setter watch. The present example purchased in 2021 has been kept in mint condition and worn with protective stickers around the watch.