The safest pick for anyone staring at a watch sold as an "Omega 3522" is not the cheapest example and not the one with the brightest photos. It is the watch whose movement has been photographed under good light, timed on a machine, and serviced recently enough to come with paperwork. Everything below is built on four criteria that decide whether the stamp on the plate carries any weight: how the movement is finished and stamped, how it winds and runs, whether the case and dial agree with the caliber inside, and whether you can verify any of it independently.

What a 3522 marking actually tells you

Omega used caliber numbers across several families, from hand-wound movements to bumper automatics to full-rotor automatics, and sellers reuse four-digit numbers loosely. A stamp on a bridge proves very little on its own. A watchmaker reads the stamp together with the bridge shapes, the jewel count, where the seconds hand sits, and how the winding weight moves.

Two kinds of buyers search for this: someone who inherited or bought a vintage Omega and wants to know whether the movement is correct, and someone shopping a high-grade replica who wants to know which tells give it away. The inspection steps are the same for both.

Criterion one: movement finishing and stamping

• Pros of a correct movement: engraving with even depth and clean edges, lettering that matches the rest of the plate, jewel settings that sit flush, screws with unchewed slots, and a finish that looks machined rather than printed.
• Cons and red flags: shallow laser-etched text, blurred or over-deep stamping, a font that changes between the caliber number and the neighboring markings, jewels that look glued or painted, and plates with tool marks that are too fresh for the age being claimed.

Use case: if you are buying remotely, ask for a macro photo of the balance area and the caliber stamp before you send money. A seller who will not provide one is telling you something useful.

Criterion two: winding and running behavior

• Pros: smooth winding with no grinding, a rotor or bumper weight that moves freely, a watch that holds a full power reserve overnight, and a timegrapher slip with rate, amplitude, and beat error printed on it.
• Cons: a seller who says "runs great" with no numbers, a watch that stops before morning, a weight that scrapes the case back, a movement that shifts when you turn the watch over, and a crown that feels gritty or skips when setting the hands.

Automatic Omegas of this period were built either with a bumper weight that swings through a short arc or with a full rotor. Which one belongs in your watch depends on the caliber family, so have a watchmaker confirm the expected behavior for that reference rather than guessing from a photo.

Criterion three: case, dial, and reference agreement

• Pros: a case reference that matches the caliber and production range, dial printing with crisp serifs and correct spacing, hands and crown that suit the reference, and a case back with wear that matches the rest of the watch.
• Cons: a reference number that points to a different caliber, a dial that is too clean for a case that is heavily polished, mismatched hand styles, or a case back stamp that looks stamped yesterday.

Use case: collect the reference number, the movement serial, and clear photos of the dial and case back, then compare them as a set rather than one at a time. Fakes usually fail on the combination, not on a single detail.

Criterion four: independent verification

• Pros: a service record or extract that documents the caliber and production range, an inspection by a watchmaker who handles vintage Omega, and a return window long enough to arrange one.
• Cons: sellers who refuse returns, "as-is" listings with no movement photos, and paperwork that is a photocopy of a photocopy.

Use case: on any purchase above a few hundred dollars, budget for one independent inspection. It is the cheapest insurance in this hobby.

Which route fits your situation

If you want a vintage original, buy only from a seller who supplies movement photos, a timed reading, and a return window, and accept that a genuine example costs real money. If you want the look without the restoration bills, a high-grade replica with a serviced automatic movement and a documented inspection is the practical choice, and you should still apply the same four checks. If the price seems far below everything else you have seen, stop and walk away; the stamp is the easiest part of a watch to fake.