Short answer
1865.10 is a seller listing code, not an Omega reference number. Omega uses a six-part format for modern references, and the 39 mm Globemaster Co-Axial Master Chronometer sits under numbers such as 130.30.39.21.03.001. When a first copy listing carries 1865.10, the photos almost always show the 39 mm Globemaster: fluted bezel, pie-pan dial, date at 6 o'clock, steel case and bracelet. Treat the code as a shelf label. Judge the watch from the images and the spec sheet, not from the number.
The genuine watch behind the copy
Omega first used the Globemaster name in 1952 on the Constellation, then parked it for decades. The 2015 revival was the first Omega to carry Master Chronometer certification, which matters because it sets the bar a replica can never reach. The real 39 mm version measures roughly 12.5 to 13 mm thick, wears small for its size thanks to a short lug-to-lug, and pairs a tungsten carbide fluted bezel with a stepped pie-pan dial, applied indices, faceted hands, and an observatory medallion with eight stars on the back.
Movements you will actually find
Most first copies of this reference run one of three things.
- Asian 2824 or 2836 clones. Common and serviceable at 28,800 vph, but a date at 6 o'clock means either an overlay disc or a reworked date wheel, and that is where alignment problems start.
- Miyota 9015 builds. Slimmer, smoother winding, decent timekeeping. The date disc has to be modified for the 6 o'clock window.
- Decorated automatics styled after the calibre 8900. Engraved bridges and rotor, sometimes a fake balance bridge. Underneath it is a plain automatic, without the twin barrels, silicon balance spring, or magnetic resistance.
None of these carry METAS certification. The 60 hour reserve and the 15,000 gauss rating belong to the genuine movement only.
What to inspect in photos
- Bezel finish. Tungsten carbide reads grey and holds a crisp fluted cut. Steel pretending to be tungsten looks brighter and softer at the edges.
- Dial printing. Pie-pan step, applied indices with polished facets, and text under 12. Thick or fuzzy letters are the usual tell.
- Date window. Font, size, and centering. A date sitting high or low in the aperture is the most common flaw.
- Caseback medallion. Depth of relief and star count vary a lot between factories.
- Bracelet and clasp. End link fit, taper, and engraving quality. Gaps show up fast once it is on a wrist.
- Hands and lume. Edges should be clean, lume even rather than blotchy.
What no first copy gets right
Master Chronometer testing, magnetic resistance to 15,000 gauss, the silicon balance spring, the twin barrel layout, and the hardness of a real tungsten bezel. Water resistance figures on replica listings are unverified, and there is no service network, so a worn movement usually means a swap rather than a repair. If accuracy under magnetism or a factory service history matters to you, a replica will not deliver either.
Quick checklist before ordering
- Confirm the case size. 39 mm is correct for this look; some listings ship 41 mm.
- Ask which movement is inside and where the date sits.
- Compare listing images against official product photos for bezel, dial, and caseback detail.
- Check the return window and how you would pay.
- Know the law where you live. Importing and selling counterfeit goods is illegal in many countries, including the United States.
A first copy can look convincing at arm's length if the bezel, dial step, and date window are right. Getting the movement expectations straight beforehand saves the disappointment later.