A fake Patek Philippe Aquanaut Travel Time is a replica of reference 5164, the dual-time steel Aquanaut that Patek Philippe introduced in 2011. The fastest way to separate a genuine watch from a fake Patek Philippe Aquanaut Travel Time is the time-zone mechanism: on a real 5164, the two pushers on the left case flank move the local hour hand in one-hour jumps while home time, the two day/night windows and the date keep running normally. Most replicas either freeze those pushers or change the hands without the correct underlying logic.
What the Travel Time Complication Actually Does
The genuine reference runs on caliber 324 S C FUS, a self-winding movement built around a dual time zone module. Two pushers sit at 8 and 10 o'clock on the left side of the case. The upper pusher advances the local hour hand forward in one-hour steps, the lower pusher moves it backward. The home-time hand, the day/night apertures at 3 and 9 o'clock and the date at 6 o'clock continue to run independently, and the date follows local time rather than home time.
That behavior is the core of the design and the hardest thing for a copy to reproduce. If the pushers do nothing, or if pressing them shifts every hand at once, the watch is not functioning like a Travel Time.
Dial, Case and Strap Giveaways
- Dial texture: the embossed grid pattern should have fine, even lines that shift as the light moves. Inexpensive copies show shallow, uneven or simply printed texture that looks flat.
- Date window: the aperture edge should be clean and the numerals should sit in the correct position inside the frame.
- Case finishing: the original mixes brushed surfaces on the case band with polished bevels on the edges. Replicas tend to polish everything the same way or leave marks near the lugs.
- Pushers: they should sit flush in the case band, not protrude, and should have a firm, short travel.
- Strap and clasp: the composite strap has a fine embossed texture and tapers into a signed fold-over clasp. Generic rubber with a lightly stamped clasp is a common shortcut.
Movement and Pusher Behavior
Ask for a short video of the pushers in use. A real dual time zone watch will jump the local hour hand cleanly while the minute hand stays put. A fake often moves the minute hand along with it, stutters, or refuses to move at all. You can also check the crown positions: winding, date setting and hand setting should each feel distinct, with no grinding or looseness.
Replica Quality Tiers
Replicas of this reference fall into rough tiers. Entry-level copies use quartz or plain automatic movements and treat the pushers as decoration. Mid-tier copies add decorated generic automatic movements and a closer case profile but still lack a true dual time function. The better copies use modified automatic movements with a working second time zone, yet the movement architecture never matches caliber 324 S C FUS, and the finishing under the caseback is where the difference becomes obvious.
How to Check Before You Buy
- Ask for the reference number and the movement number, then compare the caseback engraving against reference photos.
- Request a video of the pushers changing local time forward and backward.
- Check dimensions and weight. The genuine case is 40.8 mm across with a slim profile.
- Look at the day/night windows. They should track correctly against the hands.
- Have an independent watchmaker open the case. This is the only reliable way to confirm what is inside.
Frequently Asked Questions
Does a fake Aquanaut Travel Time have a working second time zone?
Some higher-tier copies do, in a simplified form. Most do not, and the pushers are cosmetic.
What is the single biggest giveaway?
The pushers. If they do not move the local hour hand in one-hour jumps while the rest of the watch keeps running, the watch is not a real Travel Time.
Can a jeweler confirm it in person?
Yes. A watchmaker who has handled reference 5164 will usually identify a copy within minutes of opening the caseback.