The short answer
"131.90" is not a reference number that Omega publishes for the Constellation. Modern Omega references use six groups of digits, such as 131.10.39.20.01.001. The 131 prefix does belong to the current Constellation family. The rest of the string does not match a model we could confirm. Treat 131.90 as one of two things: a seller code, or part of a price.
replica constellation 131.90 alternative
If 131.90 is a price
USD 131.90 sits in the low band for first copy Constellation listings. Watches at this price often carry a quartz movement or a low grade automatic. Plating is thin. Bracelets are often hollow. Ask for the movement name and a photo of the rotor.
If 131.90 is part of a case number
Ask the seller for the full number. A complete Omega reference has six groups of digits separated by dots. A partial number is not enough to identify a model. Ask for a photo of the caseback and the card.
Top Replica Constellation 131.90 Watch: A Comprehensive Guide
What the genuine Constellation is
Omega launched the Constellation in 1952. The line has run since. The 1964 Manhattan case added claws at 3 and 9 o'clock and an integrated bracelet. Current models keep those claws. The caseback medallion shows an observatory and eight stars.
replica constellation 131.90 alternative
Current steel models use Co-Axial Master Chronometer movements. Power reserve runs 55 to 60 hours by caliber. The watches carry METAS certification and a magnetic resistance rating of 15,000 gauss. Case sizes include 25mm, 28mm, 39mm and 41mm. Retail prices for steel models sit between about 5,000 and 8,000 USD. Gold models cost more.
Checks before you buy a replica
- Movement: ask for the caliber. Quartz and automatic look the same in a photo. Ask for a video of the seconds hand. A quartz hand ticks once per second.
- Case size: measure in mm and compare with the size of the genuine model.
- Weight: a steel genuine on a bracelet weighs about 130 to 160 grams. Replicas often weigh less.
- Bracelet: the Constellation bracelet is integrated. It has no standard lugs. Check the end links and the clasp stamp.
- Dial: check the date window position, the star, and the printing of the word Constellation.
- Glass: sapphire or mineral. Mineral scratches. Ask which one.
- Water resistance: claims above 50m on a low cost replica are not reliable.
- Engraving: caseback medallion detail, serial number, crown logo.
Legal note
In the United States, trafficking in counterfeit goods is a federal crime under 18 U.S.C. 2320. Civil suits fall under the Lanham Act. U.S. Customs and Border Protection can seize shipments. A watch that carries the Omega name and logo is a counterfeit under that law. Some sellers offer unbranded homages instead. Those avoid the trademark issue.
What we could not confirm
No Omega reference 131.90 appears in published catalogs. If a seller uses the number, ask for the full digits and the model name. If the seller cannot give both, treat the listing as unidentified.