Answer first: Omega never made a watch called the 213. The phrase shows up two ways. It can mean a vintage hand-wound Omega calibre number in the 200s, the kind of three-digit code Omega stamped on 30mm movements from the 1940s and 1950s. It can also mean the leading three digits of a modern eight-part Omega reference, where codes in the 213 range sit in the Seamaster side of the catalog. So "fake Omega 213" is shorthand for a counterfeited or misdescribed watch, and the checks change depending on which one is on the table.
Read the reference before you read the dial
Modern Omega references run in eight parts, separated by dots. The first three digits group the watch by family and case material. The next two give the case size, then the movement code, then the dial and bracelet variants. A Seamaster Diver 300M in steel starts with 210 or 212 depending on generation, and related case codes land in the 213 block. That matters because a seller who quotes "Omega 213" alone has given you nothing you can verify. Ask for the full reference and compare it against the caseback engraving, the warranty card, and the movement.
What gives a fake away first
In my experience the paperwork and the caseback are where copies fall apart, not the dial. Things I check in order:
- Reference stamping. Genuine Omega engraving is crisp, shallow, and consistent in depth. Lasered fakes look sandy or too dark.
- Serial and reference match. The serial on the movement must fall in the production range for that reference. A mismatched pair is a frankenwatch, even if every part is real.
- Date font and window. Replica date wheels use generic typefaces. Genuine Omega date numerals are narrower with tighter spacing.
- Case finishing. Look at the transition between brushed and polished surfaces. Copies blur that line or polish where the original is brushed.
- Lume plots and hands. Genuine lume sits level in the plot. Copies sit domed, uneven, or spill onto the dial.
- Crown guards and helium valve. On Seamaster cases these are the hardest shapes to copy. Compare the guard profile against catalog photos from the correct production year.
- Bracelet end links and clasp stamps. Fakes often use the wrong clasp code for the reference or a stamp that is too deep.
The movement settles it
Pull the caseback if you can, or ask for a clear photo of the movement with the rotor turned. Modern Seamaster references in this range use Omega's coaxial automatic calibres. Genuine coaxial movements have the balance wheel and escapement visible under the bridge, plus engraving that is even and readable. Replica movements are usually a decorated generic automatic with a printed plate. Printed text on a metal plate, rather than engraved text, is the single clearest signal.
If it is actually a vintage calibre 213
Vintage is a different game. Three-digit calibre numbers from the 200s belong to Omega's 30mm family, so a watch sold as a "213" is likely a small-seconds hand-wound piece from the mid-century. Redials are far more common than outright fakes here. Look for printing that sits above the surface, sub-dial rings that do not match the case patina, and hands that are the wrong length or shape for the era. Then check the serial against Omega's own dating records, since the number tells you the year the movement was finished.
Quick checklist
- Get the full eight-part reference, not a three-digit fragment.
- Confirm the reference and serial belong together.
- Photograph the movement and look for engraving, not printing.
- Compare case finishing and crown guards against period catalog images.
- Treat any watch with no service history and no matching card as unverified, whatever the seller claims.
None of this is exotic. It is patience plus a light and a loupe. If a seller resists any one of these steps, that resistance is your answer.