Short answer
The 123.10 family is the stainless steel Omega Constellation from the 2000s, the one collectors call the Double Eagle because of the four claws on the bezel. A copy version is a replica built to match that look. Reference numbers in this family run from 24mm to 38mm, and they cover both quartz and automatic Co-Axial movements. Replica makers build all of them. The gap between a good copy and a bad one shows up in the case profile, the bracelet, and the dial printing, not in the box or the paperwork.
omega constellation replica 123.10
What the real 123.10 looks like
Omega built these as dressy steel watches with an integrated bracelet, a sapphire crystal with anti-reflective coating on both faces, and a date at 3 o'clock. Automatic versions ran the Co-Axial Calibre 2500, the movement Omega brought out in 1999 as the first series production Co-Axial. Smaller 24mm and 27mm versions often used quartz. The claws are the signature. They sit at the four corners of the case and lock into the bezel, and they are the first thing I look at on any copy.
omega constellation replica 123.10
Movements you will find in copies
Quartz
This is the cheapest route. The seconds hand ticks instead of sweeping. If the real watch you are copying is a 27mm quartz model, that is not a flaw. If you are copying a 35mm automatic, a ticking hand is the tell.
Omega Constellation 123.10 Replica: Reference and Buying Guide
Automatic
Most mid and upper tier copies use a Seagull or ETA 2824 clone with a decorated rotor. Some engrave Co-Axial 2500 on the bridge. That engraving is cosmetic. The real Co-Axial escapement is a different mechanism, and no budget copy reproduces it. What matters is accuracy and serviceability. A 2824 clone keeps time and any watchmaker can regulate it.
Dial details that separate tiers
- Applied logo: the Omega symbol and the star above it should be separate raised pieces, not printed flat.
- Claws on the dial: on some references the claws appear as small markers near the center. Placement is easy to get wrong.
- Date window: check the frame and the font. Cheap copies use a flat, oversized window.
- Print: the Co-Axial Chronometer line should be thin and crisp under a loupe.
- Lume: pale and even. If it looks chalky or patchy, the dial is a low grade one.
Case and bracelet
The bracelet is half the watch. These are integrated, so a sloppy end link leaves a visible gap at the lugs. Run a fingernail along the joint. On a good copy the gap is tight enough that you feel almost nothing. Brushing should run one direction on the top links, with polish on the sides. Weigh the watch in your hand. A 35mm steel Constellation with a full bracelet has heft. If it feels hollow, the links are stamped rather than milled.
Fit and sizing
The 35mm version wears larger than the number suggests, because the bracelet starts wide and there is no lug overhang. A 6.5 inch wrist handles it. The 38mm version is the safer pick for a 7 inch wrist or bigger. Ask whether the seller includes extra links or a half link, since these bracelets size in fixed steps and a bad fit ruins the look.
What I would check before buying
- Claw alignment against the bezel, on all four corners.
- Gap at the end links, checked with a fingernail.
- Seconds hand behavior, a smooth sweep for automatic, a clean tick for quartz.
- Crown size and how it seats. Small crowns are a common shortcut.
- Crystal clarity and whether the AR coating sits on both faces.
Water resistance
Treat any copy as splash resistant at best. Gaskets on budget replicas are thin and rarely tested. I would not swim in one, and I would not shower in one. If you want a watch for the pool, buy a genuine diver instead.
Bottom line
The 123.10 is a good candidate for a copy because the design is simple: clean dial, steel case, integrated bracelet. Nothing about it demands finishing that only a factory can do. Buy from a seller who shows real photos of the actual watch and who answers questions about the movement and the links. That tells you more than any spec sheet. It is still a replica, so no Omega service center will touch it, and resale value is close to zero. Go in knowing that.