Omega Caliber 8605 in Plain Terms
Caliber 8605 is a genuine Omega movement, not something invented by replica sellers. It belongs to the Co-Axial 8500 family: a self-winding GMT caliber with two mainspring barrels, about 60 hours of power reserve, a 24-hour hand, a date window, and the Co-Axial escapement. Omega rates the Master Co-Axial generation to 15,000 gauss of magnetic resistance. In the catalog it ran inside Aqua Terra GMT and Planet Ocean GMT references. So when a listing says "replica Omega caliber 8605 watch," it means a counterfeit case, dial, and bracelet fitted with a movement that only imitates those numbers.
What a Replica 8605 Movement Actually Contains
No counterfeit operation builds a working Co-Axial escapement at volume. The common base is an Asian clone of the ETA 2836-2 with a GMT module stacked on top, hidden under decorative bridges. Higher-tier factories produce a clone with engraved plates, a rotor stamped 8605 or Si14, and blued screws. The cosmetics photograph well. The engineering does not follow. Expect a power reserve closer to 38 hours than 60, a beat rate of 28,800 vph instead of 25,200, no silicon balance spring, and no magnetic shielding. Treat the engraving as a costume, not a specification.
replica omega caliber 8605 price
Before You Inspect a Watch
- A timegrapher, or a phone app that reads beat rate and amplitude through the microphone
- A 10x loupe
- Calipers, if you plan to verify case diameter and thickness
- Reference photos of the genuine reference for comparison
- A local watchmaker who will agree to open and service a counterfeit movement
How to Evaluate a Replica 8605 Watch
- Set the time to 12:00 and confirm the 24-hour hand points straight up at the 24 or 0 marker, not offset by an hour.
- Turn the crown through each position and note where the GMT hand jumps, since the genuine caliber moves it in one-hour increments while the date follows the local hour hand.
- Wind the movement fully and set it aside, then note the exact hour it stops, because anything past 45 hours is unusual for a clone.
- Place the watch on a timegrapher and read the beat rate, looking for 25,200 vph rather than the 28,800 vph of a 2836 base.
- Watch the seconds hand for stutter and the amplitude reading for anything below 250 degrees when fully wound.
- Advance the date slowly past midnight and check that it flips once, cleanly, without dragging.
- Pull the crown to the setting position and feel for grit, wobble, or a stem that needs force.
- Open the caseback and inspect the rotor and bridges under the loupe, checking for stamped rather than engraved lettering and uneven striping.
- Measure case thickness with calipers against the published figure, since clone movements sit taller in the case.
- Ask the seller directly whether the movement accepts standard spare parts, and expect a vague answer.
Red Flags
- Listings that claim a genuine Co-Axial escapement or a genuine silicon hairspring.
- Photographs of the movement only from one angle, with the balance area obscured.
- Claims of 15,000 gauss resistance, which no replica can back up.
- Sellers who refuse a timegrapher photo with the movement running.
- Prices far below the going rate for the better clone factories, which signals a 2836-based build.
Legal and Ownership Reality
Counterfeit watches are illegal to import and sell in the United States, and shipments get seized and destroyed. Omega will not service a counterfeit, and authorized watchmakers will not order parts for one. Resale value is effectively zero, and a worn clone movement often needs a full replacement rather than a repair. If you still buy, budget for the watchmaker, not just the watch.