Quick answer
The 5738 is one of the harder Patek shapes to copy well. The genuine watch is an ultra-thin, time-only ellipse built on a golden-ratio case, and most replicas give themselves away in two places: overall thickness and dial finishing. If the case runs more than a millimeter or so thicker than the original, or the sunburst dial looks flat and grainy under a lamp, you are looking at a low-tier build no matter what the listing says.
What the real 5738 is
Patek Philippe introduced the Golden Ellipse in 1968, and the shape is the whole point. Its sides follow the golden ratio, roughly 1 to 1.618, which is why the case reads as a stretched oval rather than a plain oval. The modern reference 5738 carries that geometry forward at about 34.5 mm by 39.5 mm, with a case height just under 6 mm.
Inside sits the calibre 240, an automatic with a micro-rotor sunk into the movement instead of a full rotor on top. That is what allows the thin profile. The 5738 is a two-hand watch. There is no date, no seconds hand, and no subdial, so the dial stays clean: printed baton markers, slim hands, and a sunburst finish across the plate. Platinum and gold versions exist, mostly on an alligator strap, and the proportions stay the same across the range.
Where replicas usually fail
- Thickness. The case is the giveaway. Originals sit close to the wrist; budget replicas sit tall and catch on shirt cuffs.
- Dial finish. A true sunburst shifts shade as you rotate your wrist. Cheap versions use flat blue paint or a coarse stamped texture.
- Dial print. Logo weight, letter spacing, and marker thickness are the easiest things to compare side by side.
- Caseback engraving. Hallmarks and reference text get sloppy on the cheaper tiers, and some carry the wrong reference entirely.
- Strap and buckle. Thin, stiff leather and a stamped buckle turn up often on the sub-premium builds.
A short inspection routine
- Ask for a side-profile photo next to a ruler or a coin. Judge thickness before anything else.
- Request a video, not stills. Dial color shift only shows up in motion.
- Check the dial layout against a reference photo: no seconds hand, no date window, markers at the correct hour positions.
- Look at the crown. It should sit flush and match the case tone.
- Confirm the strap width matches the lug opening instead of being squeezed in.
Movement reality
No replica house reproduces a micro-rotor calibre at scale. Expect a thin automatic or a quartz unit depending on the tier. That matters for two reasons: how the watch wears on the wrist, and how it sounds and feels when you handle it. A dead giveaway is a running seconds hand on a model that should not have one.
Price bands, briefly
Entry builds tend to be too thick and visually flat. Mid-tier versions get the case and dial close but still use a conventional movement and a mediocre strap. The top tier is where the shape, dial, and finishing line up, and that is also where the price stops being trivial. My advice is to decide up front whether you want something that looks right across a table or something that survives close inspection. Those are different budgets.
Legal and practical notes
Selling counterfeit watches is illegal in the United States, and US Customs seizes shipments of goods bearing protected trademarks on a routine basis. Patek Philippe holds the trademarks on its name, logo, and the Ellipse design language, so a replica cannot be resold, insured, or serviced the way a genuine watch can. Resale value is effectively zero, and a repair shop will not source parts for it.
If you buy one anyway, treat it as a costume piece with a limited life. You are paying for appearance, not for an heirloom.
Bottom line
Judge the replica 5738 on proportion first, dial second, movement third. Get those three in order and you have something that wears like the real thing from a distance. Miss the thickness and no amount of dial work will hide it.