131.93 is not an Omega reference number. Omega uses six groups of digits for the Constellation line. A listing that pairs "Constellation" with "131.93" uses a seller code, a caliber code, or a stock number. Ask for the caseback photo before you pay.
What 131.93 does and does not match
Omega reference numbers for the current Constellation line carry six groups, separated by dots. Example: 131.10.39.20.01.001. The first group marks the collection, and 131 is the code for Constellation. The second group marks the case metal. Steel is 10. Steel with gold is 20. Yellow gold is 15. The third group is the case diameter in millimeters. The last three groups mark movement, dial, and version.
A two-part number such as 131.93 fits none of those slots. Omega service sheets from the 1960s and 1970s used shorter numbers for cases, bracelets, and crystals, and a code of that shape can appear there. I could not verify one official meaning. No Omega catalog I checked lists a watch as 131.93.
Constellation facts that matter for a copy
- The line started in 1952. The caseback carries an observatory medallion. Older models have a pie-pan dial.
- Current sizes are 36 mm, 39 mm, and 41 mm.
- Current movements are Master Chronometer calibers 8800 and 8900, rated 0 to +5 seconds per day, with magnetic resistance to 15,000 gauss.
- Steel models list near $6,600. Solid gold models list above $20,000.
- Many bezels carry four claws, called griffes. Bracelets are integrated.
What replica sellers ship
Case sizes sold are 38 mm, 39 mm, and 41 mm. Movement options fall into four groups: quartz, Miyota 8215, ETA 2824 clones such as the Seagull ST2130 and the Hangzhou 6460, and automatics built to fit one case and sold as super clones. Quartz copies run $80 to $150. Automatic copies run $150 to $500. Super clone listings start at $500.
Water resistance claims appear on most listings. Few copies have tested gaskets. Do not swim with one.
Checks before payment
- Ask for a caseback photo. A real Constellation caseback carries a six-part number and a medallion.
- Ask for a movement photo and a timegrapher reading. A rate inside 10 seconds per day is normal for the price.
- Compare the date window position with the model photo on the maker's site.
- Ask which bracelet fits. Integrated bracelets do not swap between cases.
- Pay by credit card. Wires and crypto carry no chargeback right.
Customs and trademark
Counterfeit watches are illegal to import into the United States. US Customs and Border Protection can seize and destroy a shipment. Selling a watch with the Omega name or logo without authorization is trademark infringement under US law. A buyer can lose both the payment and the watch.
Unconfirmed points
The meaning of 131.93 stays unverified. Ask the seller to name the factory and the movement. A seller who cannot answer has no stock.