Short answer
A fake Constellation 41mm version is a replica of the Omega Constellation Gents' Co-Axial Master Chronometer 41 mm. The genuine watch uses a 41 mm case, an integrated bracelet, two claws on the case sides, and a Calibre 8900 movement. Replica builds copy the outside shape. The movement and the finishing are where versions split.
Omega Constellation 41mm Buying Guide: Real Watches, Real Prices
Genuine dimensions the replica copies
Omega lists the 41 mm Constellation with a steel or gold case, a domed sapphire crystal, and 50 m of water resistance. Thickness on most 41 mm references sits near 12.5 mm. Two claws hold the bezel at 3 and 9 o'clock. The bracelet is integrated, so there are no standard lugs and no spring bars in the usual place.
Case diameter is the easy part to copy. A CNC case in the right size costs little. Case profile, claw shape, and bezel angle are harder.
Movement inside replica versions
- Miyota 9015: 28,800 vph, about 42 hours of power reserve.
- Seiko NH35: 21,600 vph, about 41 hours of power reserve, lower beat rate.
- 2824-type Chinese clone: 28,800 vph, about 38 hours.
Some sellers add a decorated plate and a rotor with Omega markings. A decorated plate does not change the movement under it. No replica carries METAS Master Chronometer certification, and none uses a true Co-Axial escapement.
constellation 41mm fake replica
The genuine Calibre 8900 has two barrels, 60 hours of power reserve, a silicon balance spring, and resistance to 15,000 gauss.
Dial, hands, and date
Dial layout changes by reference. Date aperture position differs between references, so a replica with the wrong date position points to a mismatched reference number. Applied indexes, hand length, and printed text are the usual tells. Ask for a close photo of the dial at 12 o'clock and at the date window.
How versions are labeled
Sellers use factory codes. Codes for Constellation models are less stable than codes for Seamaster or Submariner lines, and the same build may appear under two names. There is no public database that maps a code to a Constellation 41 mm build. Ask three questions: which movement, what case diameter measured by caliper, and what the watch weighs on a scale. Weight is a quick check on case and bracelet material.
Price
Listings for a 41 mm Constellation replica run from about $200 to $500. Price tracks the movement and the bracelet, not the case diameter. A 9015 build costs more than an NH35 build.
What is not documented
Case thickness, bracelet fit, and claw geometry vary between batches. No factory publishes a spec sheet. Numbers above come from the genuine reference and from common replica parts lists, so treat any single listing as unverified until you see measurements.