Fake Aqua Terra 326.10.40: what you are really holding
Short answer: the reference 326.10.40 is a stainless steel Omega Seamaster Aqua Terra 150M with a teak-pattern dial, a date at 3 o'clock, and an 8500-family Co-Axial movement. Copies of it arrive in three very different grades, and the grade matters more than the word "fake." A $70 market-stall watch and a $600 super-clone share a silhouette and almost nothing else. The tells live in the dial texture, the date window, the hands, the caseback engraving, and the bracelet end links.
What the real reference should be
Omega reference numbers are not random. The digits encode case material, size, and movement family, so 326.10.40 points to a steel Aqua Terra in roughly the 40 mm range with an exhibition caseback. Expect a screw-down crown, 150 m of water resistance, a domed sapphire crystal with anti-reflective coating on both faces, and a bracelet with brushed outer links and polished centers. The 8500 family runs at 25,200 vibrations per hour and holds about 60 hours of reserve. Those two numbers do a lot of work later.
Dial and hands: where cheap copies fall apart
I look at the date window first, because it is the hardest thing to fake well. On a genuine dial the aperture has crisp, slightly beveled edges, the date sits centered, and the wheel is color-matched to the dial. Cheap copies show a raw stamped hole, an off-center number, or a white wheel behind a black dial.
- Teak lines: genuine dials have depth and a soft satin grain. Copies print flat stripes that vanish at an angle.
- Applied indices: edges should be polished and sharp, with lume that fills the frame evenly and does not overflow.
- Hands: the hour and minute hands are faceted, with one brushed face and one polished face. Copies look painted or uniformly shiny.
- Seconds hand: the counterweight shape and the lume dot should match the rest of the set.
- AR coating: genuine crystals throw a faint blue or purple tint at steep angles. Bare glass usually does not.
Case, crown, and caseback
Run a fingernail along the lug bevels. Real ones are cut, not polished into a soft round-over. The crown threads should engage smoothly in a quarter turn and the logo should be deep and clean. On the back, check engraving depth, the hippocampus detail, and the reference and serial numbers. A sapphire display back that fogs or scratches from a light wipe is a giveaway. So is a caseback held by cheap cross-head screws instead of the correct fittings.
Bracelet and clasp
End links are the second-strongest tell. On a genuine bracelet they sit flush against the case with no rocking and no visible gap at the lug. Links are screwed, not pinned, on most Aqua Terra bracelets of this era, and the clasp engraving is sharp with even spacing. A copy often shows a slightly proud end link, a clasp that rattles, or micro-adjust holes that are drilled off-center.
Checks that need no toolkit
Download a beat-rate app and hold the watch to a microphone. An 8500-family movement reads 25,200 beats per hour. Common clone movements read 21,600 or 28,800, and that mismatch settles the question in ten seconds. Beyond that, listen to the rotor: a rough grind or a wobble points to a low-grade automatic. Wind it slowly and feel for grit in the crown threads. Set the date and confirm it snaps over rather than creeping.
Price, paperwork, and red flags
A full set means box, card, and a reference number that matches the caseback and the movement. Ask for photos of all three, plus the serial on the warranty card. If a seller refuses, that is the answer. One more thing worth saying plainly: selling a copy as a genuine Omega is fraud, and if you buy on that basis you have no recourse when it goes wrong. Buy a replica as a replica, with clear eyes, and you avoid both the legal mess and the disappointment.
Fast checklist
- Date window crisp, centered, and color-matched.
- Teak dial shows depth under raking light.
- Hands are faceted with mixed finishes.
- End links sit flush and links are screwed.
- Beat rate reads 25,200 per hour.
- Caseback and card numbers match.