The short answer
There is no dependable way to buy a fake Clé de Cartier Large. Counterfeit watches are illegal to import into the United States, they cannot be serviced or authenticated by Cartier, and they hold no resale value. What follows is the guide that helps: what the Large size of the Clé de Cartier is, how to separate a genuine example from a counterfeit, and how to buy the real watch without paying over market.
What Large means in this collection
Cartier launched the Clé de Cartier in 2015, naming it for the key shaped crown that winds and sets the watch. The collection spans several case sizes, and Large sits at the top of that range at roughly 40 mm across. Because Large is a size within a line rather than a single model, two watches can share the name and still differ in metal, dial, bracelet, and movement finish. A steel Large on a leather strap and a pink gold Large on a gold bracelet are the same size and very different purchases, so compare like with like.
Specification bands for a genuine Large
- Case diameter: about 40 mm, with roughly 35 mm and 31 mm sizes below it in the same line.
- Movement: Cartier in house automatic, the 1847 MC, with a power reserve in the region of two days.
- Crown: key shaped, set with a cabochon, and functional. It turns to wind and pulls out to set.
- Crystal: sapphire, with anti reflective coating applied to the inside surface.
- Water resistance: rated for splashes rather than swimming on most examples.
- Caseback: engraved with brand, reference, and serial, with the serial repeated between the lugs.
- Strap or bracelet: alligator leather, steel, or gold, closed by a signed clasp or buckle.
How to tell a counterfeit from a genuine Large
- Work the crown. On a genuine Clé, the key shaped crown is the winding mechanism. On counterfeits it is often decorative or stiff.
- Read the dial under magnification. Printing on a genuine dial is crisp, with even spacing and sharp serifs on the Roman numerals.
- Check the date window. It should sit square to the dial, and the numerals should align with the aperture.
- Inspect the caseback engraving. Genuine engraving cuts clean and deep, while replica engraving looks laser etched and shallow.
- Look at the movement. A genuine 1847 MC shows finished bridges, polished or blued screws, and a signed rotor.
- Weigh it in hand. Solid gold cases carry weight that gold plated brass does not.
- Examine the strap and clasp. Stitching is even, edges are sealed, and the clasp carries the same signature as the dial.
- Verify the paperwork. Reference numbers on the card, the caseback, and the warranty should agree.
Why the counterfeit route fails in practice
U.S. Customs and Border Protection seizes and destroys counterfeit watches, and the personal import exemption does not cover them. Selling counterfeit goods is a federal crime under 18 U.S.C. 2320. Beyond the legal exposure, a counterfeit cannot be serviced by Cartier or by most independent watchmakers, since parts are not made for it and the movement is not the caliber it imitates. Resale value is effectively zero, and many replica sellers take payment by wire or gift card, which leaves no recourse if the watch never arrives or arrives broken. The AAA and 1:1 clone labels used in listings are marketing terms with no standard behind them.
Pitfalls when buying the genuine watch
- Buying from a private seller with no feedback history and no return window.
- Trusting photos. Ask for dated images of the caseback, crown, and clasp.
- Accepting forged box and papers as proof. Packaging is easy to copy, the watch is not.
- Ignoring service history. A Clé that has never been serviced may need a full overhaul soon after purchase.
- Skipping authentication. Cartier boutiques and independent watchmakers can confirm a movement and case.
- Comparing a steel Large against a gold Large and assuming the price gap is negotiation room.
FAQ
Is it legal to buy a fake Cartier watch in the US?
No. Importing counterfeit goods violates federal trademark law, and the shipment can be seized and destroyed. Buying one domestically does not make it legal to resell.
Will Cartier service a counterfeit Clé de Cartier?
No. Cartier services its own watches, and a counterfeit does not contain Cartier parts. Independent watchmakers also face a parts problem.
How can I confirm a Clé de Cartier Large is genuine before paying?
Have the movement inspected, match the serial between the lugs to the caseback and paperwork, and buy from a seller who accepts returns and offers an escrow or card payment option.
Do counterfeit Clé de Cartier watches keep time well?
Some run, but accuracy, water resistance, and durability are not guaranteed. A watchmaker has no parts or service data for the movement, so a fault often means the watch is finished.