The Omega De Ville Trésor 40mm is a slim dress watch that Omega has sold since 2014, with a 40mm case, sapphire crystal, and a Master Co-Axial or Master Chronometer movement inside. The "424" in the search phrase belongs to De Ville Prestige reference numbers, so listings that mix "Trésor" with "424" are combining two different Omega lines. A watch sold under that label is a trademark-infringing replica, not a factory second, an overrun, or an unmarked grey-market piece.

What the genuine De Ville Trésor 40mm looks like

The Trésor is Omega's dress line: thin case, quiet dial, leather strap. The 40mm version measures near 10mm thick, which lets it sit under a shirt cuff.

Early Trésor models from 2014 ran a manual-wind Master Co-Axial movement. Later versions use Master Chronometer automatic calibres with high magnetic resistance and a longer power reserve.

Specs buyers compare

• Case: 40mm diameter in steel, yellow gold, red gold, or two-tone.
• Crystal: domed sapphire on most versions, with a sapphire caseback on many.
• Dial: silver, blue, black, or enamel-style finishes with printed or applied markers.
• Movement: Master Co-Axial or Master Chronometer certified, visible through the caseback.
• Strap: alligator or calf leather with a signed pin buckle or deployant clasp.

What does the "424" reference number mean?

Omega builds references in three blocks, and the first block names the collection and the case material. De Ville Prestige uses the 424 prefix, which is why numbers like 424.13.40.20.02.001 appear on Prestige listings rather than Trésor listings. Trésor references use other prefixes, including 435. Counterfeit sellers string several numbers together to catch more search traffic, so one product page can carry both names.

Why people search for a "fake Omega De Ville Trésor 40mm 424"

The price gap drives most of the interest. A steel Trésor on leather lists in the mid four figures in US dollars, and gold versions cost more.

Replica sites also pad product pages with extra reference strings. That trick makes one fake watch page appear for many different Omega searches, including ones that describe models the seller does not stock.

How to tell a counterfeit De Ville Trésor from a real one

No single detail proves a watch is fake. Build the case from the dial, the case, the movement, and the paperwork together.

Dial and hands

• Print: real dial text is crisp, with tight spacing. Fakes show thick or smudged letters, and the OMEGA mark sits off-center.
• Markers: applied markers on authentic pieces have polished edges and flat tops. Copies look rounded or sit too high.
• Hands: genuine hands are thin with clean tips. Replicas look bulky, and the sweep hand can rub the crystal.
• Sub-dial and date: spacing and font change on fakes, and a date window that sits off-axis is a common fault.

Case, crown, and caseback

• Case sides should stay sharp where brushed surfaces meet polished ones. Replicas blur that line.
• The crown logo is deep and clean on a real Omega. A shallow laser etch or a soft relief points to a copy.
• Caseback engraving on genuine pieces is cut rather than stamped, and the reference and serial numbers match the papers.

Movement

A Trésor with a clear caseback shows its movement, which makes this the easiest place to check. Real movements carry Geneva stripes, blued screws, and rotor text that lines up with the calibre number.

Most counterfeits hide a basic Asian automatic inside a decorated plate. Ask for a photo of the balance wheel and the rotor edge before any money moves.

Strap, clasp, and paperwork

Genuine Omega straps carry a stamped size and a straight stitching line. Clasp engravings are deep, and the folding parts close with a firm click.

Papers matter as much as the watch. A Trésor should arrive with a pictogram card, a card showing the reference and serial, and a Master Chronometer certificate when the model calls for one.

What are the risks of buying a counterfeit?

• Seizure: US Customs can hold and destroy counterfeit goods at import. You lose the watch and the money.
• No service: Omega boutiques and authorized service centers do not repair replica watches or supply parts for them.
• No resale value: replicas trade for a fraction of the purchase price, and many buyers refuse them outright.
• Legal exposure: trafficking in counterfeit goods is a federal offense in the United States, and penalties rise with repeat sales.

FAQ

Is a "1:1 Swiss super clone" the same as the real watch?

No. "1:1" and "Swiss super clone" are marketing terms with no standard definition. Sellers apply them to watches with Asian movements, plated base metals, and no Omega parts.

Do fake De Ville Trésor watches use real Omega movements?

Almost never. Omega does not sell loose Master Co-Axial or Master Chronometer movements to third parties, so any movement inside a replica is a copy or a generic calibre.

Will an Omega service center repair a counterfeit?

No. Omega service centers work on genuine watches only, and a counterfeit carries no valid warranty and no service record.

Is it illegal to own a counterfeit watch?

Owning one is not the main legal problem. Buying, importing, or reselling counterfeit goods is where US law, customs rules, and trademark owners take action.

What should a buyer do instead?

If you want the Trésor look at a lower price, buy a used genuine Omega from a dealer who supplies papers and a service history. Prices for older De Ville Prestige and Trésor references drop once a model has been on sale for a few years.

Independent dress watches from brands such as Nomos, Junghans, and Longines cover the same slim, quiet style well below Swiss luxury pricing. You get a warranty, a real service network, and resale value that holds.