Short answer
"Fake hippocampus 2013" is not a model name, a brand, or a documented event. No watch company sells a product called a hippocampus. The phrase is search shorthand that points to one subject in the watch trade: the seahorse, or hippocampus, engraved on the caseback of Omega Seamaster watches, and the replicas built around 2013 that got that engraving wrong. A second reading treats hippocampus as the brain structure and 2013 as a study date. That reading has no link to watches, and no single verified 2013 study is tied to the phrase.
Why a seahorse sits on an Omega caseback
A hippocampus is a seahorse. The word comes from Greek, where it names a mythical sea creature with a horse front and a fish tail. Omega has used the seahorse as a Seamaster emblem since 1957, and it appears on the caseback of most Seamaster references. On genuine watches the seahorse is a raised relief. The metal is stamped from behind or embossed, so the fins, tail curl, and dorsal ridge stand above the surface and cast shadows under a light.
How 2013-era replicas got the seahorse wrong
Replica casebacks from that period were made from a mold taken off a genuine case or from a scan. The copy lost depth. Common defects:
- Seahorse sits flat or shows faint etching instead of raised relief.
- Fin count and tail curl differ from a genuine stamp.
- Laser engraving lines show under magnification.
- Lettering under the seahorse is thin, spaced wrong, or runs the wrong direction.
- Reference numbers and serials sit in the wrong position.
- Caseback threads are coarse; the case does not seat with a quarter turn.
Refinishing hides some of this. A seller can polish a flat seahorse until it reads as shallow rather than wrong.
Other checks on a 2013-period Seamaster
Caseback detail is one signal. Movement, crown, and dial carry the others. Genuine Seamaster 300M and Planet Ocean watches of that era used Omega calibers 1120, 2500, or 8500. Replicas used Miyota 8215, ETA 2824 clones, or Chinese copies with decorated rotors. Check the rotor engraving, the balance frequency (25,200 vph for the 2500, 28,800 for the 8500), and the position of the date window. The helium escape valve on a 300M sits at 10 o'clock. Replica valves often do not turn.
What cannot be verified
No public database dates a replica to 2013. No factory records exist for the workshops that made them. Photos alone cannot fix a production year, because the same case molds ran for years. Claims that a specific watch is a 2013 fake hippocampus rest on the seller's word. Ask for the movement, the crown action, and a straight-on photo of the caseback under raking light.
Buying checks
- Look at the caseback at an angle. Genuine relief casts a shadow.
- Compare fin count and tail curl against a known genuine reference.
- Check the rotor and the balance frequency.
- Confirm the serial format for that reference.
- Let price guide the answer. A running 8500 Seamaster does not sell for $200.