Short answer
No replica Omega Caliber 9800 is an Omega movement. The real 9800 sits in Omega's 9xxx tier of Co-Axial Master Chronometer automatics, and it goes through METAS certification, a silicon balance spring, and a level of magnetic resistance that no factory clone matches. What sellers call a "9800 replica" is a decorated third-party automatic, often a 2824 or 2892 pattern, with the right engraving on the rotor and a finish that reads close under a loupe at arm's length. You are buying appearance and reliable timekeeping, not the architecture.
What the genuine Caliber 9800 is
Omega numbers its movements by family and complication. The 9xxx group sits above the 8xxx group and shows up in the more expensive references. These calibers share a recipe: Co-Axial escapement, free-sprung balance, silicon balance spring, a 25,200 vph beat, and METAS Master Chronometer certification that tests the fully cased watch instead of a bare movement. The magnetic headline is 15,000 gauss, and it comes from non-ferrous components rather than a soft iron cage.
Look up what a genuine 9800 costs as a service part and the picture falls into place. One movement costs more than most complete replica watches.
What sits inside a replica 9800
Three bases cover almost everything sold under this name. The first is a Seagull ST2130 or a Hangzhou 6300, both ETA 2824 patterns, cheap, easy to service, and 28,800 vph. The second is a Miyota 9015, thinner and smoother to wind, also 28,800 vph. The third is a Chinese 2892 clone, which buys a slimmer case and a rotor that spins with less noise. On top of any of these comes decoration: Cotes de Geneve stripes, perlage on the plates, blued screws, and a rotor engraved to look like Omega's.
None of that changes how the watch runs. The decoration is the product.
How I judge one before buying
- Beat rate. A real 9800 runs at 25,200 vph. Most clones run at 28,800. Film the second hand in slow motion on your phone and count the ticks per second. Four ticks points to a 2824 base, not a 9800.
- Winding feel. Hand-wind a few turns. Grit or a rough ratchet usually means a low-grade base.
- Rotor noise. Shake it near your ear. A healthy 9015 stays quiet. A dry or loose rotor rattles.
- Date change. It should snap over at midnight, not creep from 11 pm.
- Engraving quality. Laser etching on a replica caseback looks shallow and matte. Real engraving has depth and a slight polish inside the cuts.
Where the money should go
The movement is the least visible part of a replica and often the least important on the wrist. Case profile, lug shape, crystal clarity, anti-reflective coating, dial printing, and bracelet end links are what people notice. A well-finished case with a plain clone movement beats a fancy engraved rotor inside a case with soft edges every time.
Red flags
- "Swiss ETA 9800." ETA does not make Omega's 9800, and Omega does not sell it loose.
- "1:1 clone of the 9800." No factory builds a true Co-Axial clone with a silicon spring and twin barrels.
- Stock photos of an open caseback that never match the delivered watch. Ask for images of the actual unit.
- Claims of METAS certification. That paperwork belongs to Omega, not to a replica.
Living with it
Treat water resistance as marketing. A screw-down crown on a replica is a cosmetic feature, and a gasket that was never pressure tested will fail. Keep it away from showers, pools, and the ocean. Expect a service or a movement swap every few years, and confirm your watchmaker will touch clones before you buy. If the goal is a look you enjoy at a price that makes sense, a decorated 2824 pattern does the job. If the goal is the 9800 itself, save for the real thing.