Short answer
The number 131 is an Omega case reference prefix, not a model name. It appears on vintage Constellation cases from the late 1960s and early 1970s. No known super clone factory builds a 1:1 copy of a 131 series Constellation. Listings that carry the term are, in most cases, generic quartz watches with a printed dial and an Omega logo. Buyers read "Swiss super clone" as a quality claim. It is a search term.
What the 131 prefix covers
Omega used numeric case references through the 1960s and 1970s. The 131.xxx block belongs to that window of Constellation production. Genuine examples carry a pie pan dial, applied indexes, dauphine hands, a date window at 3 o'clock, and a screw back case with the stamped Observatory medallion: stars above the Geneva Observatory emblem. Movements from the period include caliber 561, 564, and 712, all chronometer grade, 24 jewels, adjusted to five positions. Public documentation for each 131.xxx variant is thin. Reference databases list parts of the block, not every number.
What sellers claim
- "1:1 Swiss super clone" with a Swiss ETA movement.
- "Same factory as Rolex clones."
- "Real gold medallion, real sapphire crystal."
- "Passes any watchmaker inspection."
Clone factories put volume into current Rolex references: Submariner 126610, Daytona 116500, Datejust 126334. Vintage Omega references get low volume because the buyer pool is small and the reference photos are hard to copy.
Checks on a 131 case
- Caseback medallion: stamped and raised on originals, etched or glued on copies.
- Movement: signed rotor, caliber number under the balance cock, adjustment marks.
- Dial: "OMEGA" and the symbol at 12, "Swiss Made" at 6, even print on the minute track.
- Case number inside the back matches the reference on the outside.
- Price: a 131 series watch offered at $120 is not a 131 series watch.
Price points
Genuine steel 131 series Constellations change hands between $700 and $2,500 at auction, based on dial, case, and papers. Replica listings for vintage Omega sit between $60 and $250. Super clone Rolex listings sit between $400 and $1,200. The gap tells you which product the sellers actually make.
US legal status
Counterfeit watches are illegal to import, sell, or traffic. 18 U.S.C. § 2320 covers trafficking in counterfeit goods and carries prison terms. 19 U.S.C. § 1526 lets US Customs and Border Protection seize and destroy counterfeit merchandise. Personal use is not a defense. One watch in a mail parcel can be seized. Omega can also file civil claims under the Lanham Act.
Bottom line
A replica 131 is not a replica of a 131. It is a quartz watch with vintage styling. If the goal is the look of a 1960s Constellation, the honest options are a genuine vintage example, a modern reissue, or a generic watch with no logo.