Short answer
The Patrimony Ultra-Thin is one of the hardest watches to fake convincingly, because almost everything that makes it special disappears in a photo. The 40 mm references sit around 6.8 mm thick, the hand-wound calibre 1400 is barely over 2 mm tall, and the dial furniture is solid gold. Fakes fail on thickness first, then on the movement, then on the dial print. A cheap one is a 9 mm steel case with a Miyota inside. A top-tier super clone gets the profile and the dial close for $400 to $700, but it still is not 6.8 mm, and it still is not a 1400.
Measure the case before you look at anything else
Thin is the whole point of this watch, and thin is the hardest thing to copy. Take a caliper reading at the caseback, not across the crystal, and do it at the edge of the case. Genuine 40 mm Patrimony Ultra-Thin watches land near 6.8 mm. Most fakes land between 8.5 mm and 10 mm. On the wrist that difference reads instantly, and it shows up in how the watch sits under a shirt cuff. If a seller will not show a caliper photo next to the case, assume 9 mm.
Movement and caseback
The real reference is hand-wound, so there is no rotor and no date. Open the caseback on a fake and you often find a decorated automatic with a rotor that should not exist, or a Miyota 9039 with Geneva stripes printed on the bridges. The genuine calibre 1400 runs at 4 Hz, holds roughly 40 hours, and carries the Hallmark of Geneva, which means the finishing standards are inspected, not just advertised. Look for real bevels that catch light and change angle, circular graining on the mainplate, and crisp engraving. Printed decoration looks flat from every angle, and the screw slots on fakes are usually chewed or too shallow.
Dial, hands, and small seconds
The dial is a silvered opaline finish with a faint warm tone, applied gold baton markers with polished facets, and small seconds at 6 o'clock. Check these things up close:
- Markers should be three dimensional, with a mirror facet down the middle. Flat plated markers are the giveaway on mid-tier fakes.
- The subdial ring should be printed clean and thin, with even spacing. Blurry or thick printing shows up under a loupe.
- The lettering weight matters. Fake dials often run bold or crowded, and the accent on Geneve is misplaced.
- Hands should be thin leaf shapes with polished sides and a clean bevel. Fakes use stamped hands with soft edges.
- Swiss Made sits low near the 6 o'clock edge on the genuine dial, not floating above the subdial.
Crown, case metal, and weight
The genuine crown is small, with a Maltese cross that is cut deep and centered. Fakes usually have a shallow cross or a plain crown. Genuine cases are 18k pink gold, white gold, or platinum, so a 40 mm head weighs noticeably more than a steel fake, and the plating on a fake wears through at the lugs and caseback edges within months. Run a finger along the lug profile. Real ones are hand-polished with an even curve, and the bezel arc flows into the case without a hard step.
What each price tier actually buys
- $50 to $120: mineral glass, printed dial, quartz or a rough automatic, 9 to 10 mm thick. Fine as a beater, useless as a stand-in.
- $200 to $350: sapphire crystal, better dial printing, Miyota-based movement, still thick and still wrong at the caseback.
- $400 to $700: the best super clones. Custom case, hand-wound clone movement, engraved bridges, correct small seconds placement. This is the only tier worth considering if you care about the silhouette.
No replica reaches 6.8 mm with a movement that resembles the 1400, because a finished thin hand-wound movement costs more than the entire replica. If a listing claims exact thickness at a low price, the number is invented.
Questions worth asking a seller
- What is the measured case thickness at the caseback edge?
- Is the movement hand-wound or automatic, and what is the base calibre?
- Are the markers solid gold or plated brass?
- Is the crystal sapphire on both sides?
- Can you send a photo of the caseback and the crown from the side?
Bottom line
Judge a fake Patrimony Ultra-Thin the way you would judge the real one: thickness first, movement second, dial third. If the thinness matters to you, buy the best tier you can afford and accept about 8 mm on the wrist. If you need 6.8 mm, only the genuine watch delivers it. And keep in mind that a replica is a copy of a trademarked design, so selling one as authentic is fraud, and passing it off in a private sale can follow you.