What a replica Omega 3604 actually is
The 3604 in "replica Omega 3604" is a reference number, not a model name. Sellers on Chinese marketplaces attach it to Speedmaster-line chronographs and, less often, to automatic three-handers that share the same case family. That means the first job is not picking a factory. It is pinning down which exact reference and dial variant you are being offered, because two listings with the same number can be entirely different watches. A replica of that watch is a counterfeit: a case, dial, bracelet, and movement built to imitate the original without Omega's authorization. Nothing sold under that description is genuine, and import or resale in the US carries legal risk.
Pin the reference before you compare anything
- Ask the seller for the full reference with all digits, including any suffix, plus the dial color code.
- Look that reference up on Omega's own catalog page to get the official case diameter, thickness, movement, crystal, and bracelet specification.
- Write those numbers down. You will check the seller's photos against that sheet, not against other replica listings.
- Confirm the movement type in writing: automatic chronograph, automatic time-and-date, or quartz. Sellers routinely swap movements between listings that share a reference number.
- Ask for the caseback engraving and the reference stamped between the lugs, then compare the font to the catalog photo.
Where the money goes: five points of difference
Two factories can ship the same reference with a large price gap, and the gap shows up in predictable places.
- Case profile: the mid-case curve, lug thickness, and crown guard shape. Soft edges and a too-thick caseback are the usual tells.
- Dial printing: hour-marker surrounds, text weight, and the spacing between the logo and the wordmark.
- Subdial position: on chronograph replicas the running-seconds and minute counters sit too close together or too far apart when the factory uses a stock movement instead of a clone.
- Bracelet and end links: solid versus folded links, the taper, and how the end links meet the lugs. A loose fit at the lugs is common on cheap builds.
- Movement finish and rate: a decorated rotor is cosmetic. What matters is the beat rate, the power reserve, and whether the chronograph resets cleanly to zero.
QC photo checklist
Request these shots before paying. Reputable sellers provide them as a set.
- Dial straight-on, no flash, so printing and marker alignment are readable.
- Macro of the subdials, showing hand length and how the hands sit relative to the markers.
- Case side profile on a flat surface, to check thickness and caseback height.
- Lugs and end links from underneath, to see the fit and the spring bar seating.
- Caseback engraving, in focus, with the reference visible.
- Bracelet clasp closed, then open, showing the stamping and the fold quality.
- Movement shot with the caseback off, showing the rotor, bridges, and any engraving.
- A timegrapher readout or a short video with the chronograph started, stopped, and reset.
Price expectations
Entry builds of this reference cluster at the low end and use stock movements with generic dial printing. Mid-tier builds carry clone movements, correct subdial spacing, and sapphire with proper anti-reflective coating. Top-tier builds add a closer case profile, better bracelet finishing, and more accurate engraving. Anything priced far below the entry tier is usually a bait listing or a different watch shipped than the one photographed. Factor in shipping, customs seizure risk, and the cost of a service or relume if the watch arrives rough.
Red flags
- No reference number given, or the number changes between messages.
- Photos that are clearly catalog renders rather than the actual unit.
- Refusal to send a movement shot or a timegrapher reading.
- Claims of "1:1" or "same factory as the genuine" with no specification details.
- Payment only through irreversible channels with no dispute path.
Legal and practical note
Counterfeit watches infringe Omega's trademarks. US Customs and Border Protection can seize shipments, and reselling a counterfeit as genuine is a separate offense. Buy and wear with that in mind, keep expectations calibrated to what a replica is, and do not treat any of it as an investment.