Short answer first

In the replica trade, "Patek Philippe 720" is a loose tag for the Twenty~4 line, and most often for the round Twenty~4 Automatic that Patek Philippe introduced in 2018. Sellers shorten the reference in listing titles, buyers copy that shorter term into search, and the number ends up meaning whatever a given storefront wants it to mean. Treat it as marketing, not a spec. The important part: no counterfeit of this model exists at a level that would fool a jeweler, a Patek service center, or anyone who has handled the real watch. The market here is about degrees of wrong, not accuracy.

Why this model is hard to copy

A small, thin, diamond-set dress watch with an integrated bracelet gives replica factories nothing to hide behind. Their best work goes into 40 mm steel sports watches, where a generic automatic movement and a slab case fit with room to spare. The Twenty~4 is the opposite problem: tight tolerances, a slim profile, matched stones, and end links that have to sit flush. Every shortcut shows up on the wrist.

The tells that actually matter

Case size and finishing

Use calipers before anything else. Official specs list the automatic Twenty~4 at 36 mm across. Counterfeits land at 33, 34, or a stretched 38. Beyond size, look at the case flank: the real watch carries a polished bevel that runs the full length of the case and meets the lugs cleanly. Fakes round that transition off or leave a burr. The first bracelet link is the fastest giveaway, because real end links sit flush with no visible step or gap.

Bezel stones

Patek sets its bezels with top Wesselton diamonds, matched at the factory for color and cut. Counterfeit bezels use cubic zirconia or commercial-grade stones. Through a loupe the gap is wide: CZ throws a flat white sparkle, and the settings look stamped instead of cut. Check the corners of the bezel too. Real setting work is even the whole way around.

Dial printing and date

Real dials have a fine sunburst that shifts as you tilt them, applied gold numerals with sharp edges, and printing that stays crisp at 10x magnification. Fakes give you flatter texture, glued or painted markers, and heavier lettering. On the automatic Twenty~4 the date sits at 6 o'clock. If a listing shows the window at 3, or no frame around it at all, the dial is not the reference being advertised. Compare any photo against official Patek images before you go further.

Movement

This is the wall. The real watch runs Patek's own self-winding calibre with a gold rotor, Geneva stripes, perlage, and hand finishing no replica house reproduces. There is no widely available clone of that movement, and no factory sells a drop-in version. What you get instead is quartz in a heavy case, or a cheap automatic with a decorated rotor plate and painted stripes. Treat every "Swiss movement" claim on a 720 listing as false unless the seller shows a running movement number matching the caseback and a Patek service record to go with it.

Metal and weight

Rose gold has heft. Hold a genuine piece and then a fake and the difference is obvious without a scale, but a kitchen scale settles it. Counterfeits are steel with plating, or plated brass. Look inside the caseback for Swiss assay marks and matching case and movement numbers.

If you are the buyer

• US Customs and Border Protection seizes counterfeit goods at import. You can lose both the watch and the money, and bringing counterfeits in can carry civil penalties.
• No warranty, no service, no spare parts, ever.
• Resale value is zero. No legitimate dealer or auction house will touch it.
• Payment is untraceable, so a seller who ships nothing has no downside.

If you worry about being sold one

Buy from a dealer with a Patek account or a documented history of trading the brand. Ask for the Extract from the Archives, service papers, and a movement number that matches the caseback. Then have the watch opened by an independent watchmaker who does not work for the seller. A caliper measurement, a weight check, and a look at the date placement settle most cases in five minutes. If a seller refuses any of it, walk away.