A fake Constellation 131.23 is a counterfeit of the Omega Constellation 39 mm in 18K Sedna gold on a leather strap, sold under a reference that begins 131.23. The genuine watch is a Master Chronometer with a solid gold case and an Omega calibre 8801 movement, and it sells for roughly 20,000 US dollars before tax. Because the real watch depends on gold weight, movement finishing, and METAS certification, most counterfeits fail at least one of those three tests.
What does the reference 131.23 tell you?
Omega reference numbers are built from material and configuration codes rather than a single model name. In the modern Constellation line, the 131.23 prefix points to a 39 mm case in 18K Sedna gold paired with a leather strap, while the trailing digits define the dial and strap variant. That means a true 131.23 is a solid gold watch, not steel and not two-tone, so any steel watch sold as a 131.23 is mislabeled from the first message.
How do you spot a fake Omega Constellation 131.23?
Compare weight, movement, and paperwork. Gold-plated fakes feel light in the hand, run on cloned movements, and rarely arrive with a matching METAS certificate. Work through the checks below before any deal.
1. Weight, gold color, and hallmarks
- Sedna gold is a dense alloy of gold, copper, and palladium, so a full gold 39 mm Constellation on a strap weighs clearly more than a plated fake.
- Sedna gold has a warmer, more muted tone than standard rose gold, while fakes often show bright copper-orange plating.
- Look for the Omega symbol and gold purity marks on the caseback and buckle. Fakes often omit hallmarks or stamp them faintly.
2. The claws, bezel, and case finishing
Constellation cases carry signature claws at 3 and 9 o'clock and a bezel with engraved Roman numerals. On genuine pieces the claws are crisp, symmetrical, and polished on the outer faces with brushed sides. Fakes usually show soft, uneven claws and blurry engraved numerals under magnification.
3. Movement and Master Chronometer status
The 131.23 runs Omega calibre 8801, a co-axial Master Chronometer with an 18K Sedna gold rotor and balance bridge. A genuine movement shows Geneva stripes, a free-sprung balance with a silicon hairspring, and clean perlage, plus a serial number that matches the case. Every genuine watch also ships with a METAS Master Chronometer card listing the eight test results and the individual watch number.
4. Dial, hands, and crown
Applied gold indexes and the raised Omega logo sit flush and catch light cleanly on the real dial. Fakes show fuzzy CONSTELLATION and CO-AXIAL MASTER CHRONOMETER printing, misaligned indexes, and a crown that is unsigned or turns loosely.
5. Price as a red flag
A genuine gold Constellation 131.23 sells new for around 20,000 dollars and rarely drops below five figures used. Any offer in the hundreds or low thousands is not a bargain on gold. It is either a counterfeit or a non-existent watch used to collect deposits.
What paperwork and checks confirm authenticity?
- Match the case serial to the movement serial and to the METAS Master Chronometer card.
- Confirm the full nine-digit number on the caseback and card reads 131.23 with the correct dial code.
- Weigh the watch on a digital scale and compare it with published gold weights for the 39 mm Constellation.
- Have a watchmaker open the caseback and inspect the calibre 8801, the gold rotor, and the engraving quality.
Frequently asked questions
Are counterfeit Constellation 131.23 watches common?
Gold models are counterfeited less often than steel sports watches, but gold-tone fakes still circulate, usually built on plated steel cases with cheap movements. They appear most on social marketplaces, classified ads, and auction listings that pressure buyers to move fast.
Can a jeweler tell a fake by looking alone?
Sometimes, especially through weight, gold tone, and finishing, but the reliable answer comes from opening the case. A watchmaker checking the movement, serial numbers, and hallmark stamps can confirm authenticity in minutes.
What should you do if you already bought a fake?
Stop wearing it, keep every message and payment record, and report the seller to the platform and your payment provider. Gold counterfeit watches also carry no service support from Omega, so the watch holds little resale value.