Short answer
"Imitation hippocampus 2020" is a search phrase, not a catalog name. It points to replica versions of the watch that carries the hippocampus emblem, most often an Omega Seamaster sold around the 2020 model year. No factory publishes one spec sheet for the phrase. Case size, movement and dial finish change by factory and by batch. Confirm the exact reference before you pay.
What the hippocampus is
The hippocampus is a seahorse. Omega uses the seahorse as the emblem of the Seamaster line, and the mark sits on the caseback of most Seamaster references. The search phrase stacks three things: a replica, the seahorse emblem, and a year. The year can mean the watch model or the season the buyer started looking. The two do not always match.
Knockoff Hippocampus 2020: What the Term Means and What Buyers Get
Confirm the reference first
Ask the seller for the reference number on the caseback and the stated year. Seamaster cases from 2020 include the Diver 300M at 42 mm, the Aqua Terra at 38 mm and 41 mm, and the Planet Ocean at 39.5 mm, 43.5 mm and 45.5 mm. Case size is the first filter. A 42 mm diver and a 41 mm Aqua Terra share an emblem and little else. Bezel, dial layout, bracelet and movement all differ.
Movements used in this class
Replicas at this level run one of four movements: a Miyota 9015, a Seiko NH35, a Chinese clone of the ETA 2824, or a decorated Chinese clone of the Omega 8500 with a copied rotor. The Miyota and the NH35 keep time and take standard service parts. The 8500 clone looks correct through a display back and runs with less accuracy. Ask which movement is inside and ask for a photo of it. A seller who cannot send one is guessing.
Checks on the case, dial and bracelet
- Index alignment: markers at 12, 3, 6 and 9 should meet the printed track.
- Date window: edges are cut sharp on good cases, rounded or ragged on cheap ones.
- Bezel: 120 clicks on a diver, no back play, insert flush with the case.
- Lume: charge it for 30 seconds under a lamp. Weak lume fades inside an hour.
- Bracelet: end links sit flush at the lugs, gap under 0.5 mm, clasp closes with one push.
- Crown: screws down in two turns or fewer, threads feel smooth, no grit.
Price bands seen in 2020
- Under $120: quartz or low grade automatic, mineral glass, stamped clasp.
- $200 to $350: NH35 or 2824 clone, sapphire glass, solid bracelet.
- $400 to $650: decorated 8500 clone, cleaner dial print, ceramic bezel insert.
These bands are a starting point. Prices move with supply, and a higher price does not prove a better watch. Compare three sellers on the same reference.
Questions to send before paying
- What is the reference number and the case diameter?
- Which movement, and can you photograph it?
- Is the crystal sapphire or mineral?
- What is the return window, and who pays return shipping?
- Is the watch in stock or built to order?
Care and service
Have the watch pressure tested before swimming. Gaskets on replicas are the first part to fail. Service the movement every four to six years, or when it drifts more than 15 seconds a day. Keep the caseback seal dry and free of salt.
What stays unknown
Factory names change, batch specs go unrecorded, and a spec list from one seller will not match the next. Treat any single review as one data point.