The Short Answer
Every fake Omega Seamaster 300 70th Anniversary on the market is a copy of one watch: the 41mm steel Summer Blue model Omega brought out in 2023 for the Seamaster's 70th birthday. There is no true 1:1 version. There are tiers. The tier you get comes down to three things, the dial gradient, the bezel insert, and the movement under the caseback. Nail those and almost nobody will question the watch on your wrist. Miss the gradient and it reads as fake from across a table.
Fast Tells in Listing Photos
- Dial: pale blue at the center fading to deep blue at the edges. Cheap copies print a flat blue or leave a visible band where the gradient was sprayed on.
- Bezel: blue ceramic with white enamel in the dive scale. On low-tier reps the fill sits proud of the ceramic and catches light in patches.
- Lume: light blue, matching the dial. Green lume is an instant fail.
- Seconds hand: lollipop style, polished edges, clean tip.
- Date: there is none. A date window at 3 o'clock means you are looking at a different reference, not a copy of this one.
Dial and Hands
The gradient is the hardest thing to fake and the easiest thing to check. Ask for two photos, one in daylight and one indoors under warm light. A real dial shifts with the light; a printed fake stays the same flat blue in both. Look at the printing too. "Seamaster" and the depth rating should be thin and sharp. Rep dials often use ink that runs a touch thick, so the letters look like they were drawn with a marker.
Hands on the genuine are polished and faceted, with lume that fills the frame edge to edge. On fakes you see ragged lume borders, a seconds hand sitting too high off the dial, or a tip that was hand-polished and lost its shape.
Case and Bracelet
This is a 41mm steel case with lyre-shaped lugs, and the finishing mixes brushed flats with polished bevels. Replicas usually get the outline close and the transitions wrong. Run a thumb over the lug bevel. If it feels like a soft roll instead of a defined line, the case was machined and then buffed until the edge disappeared. Check the end links as well. A visible gap at the lug is common on cheaper builds, and it is one of those small flaws you notice every time you look down.
Bezel, Caseback, Movement
The bezel should click in firm, even steps with no backward play once it locks. The caseback is another spot where reps rush: engraving depth, letter spacing, and how the reference numbers sit against the surrounding metal. The genuine watch runs a METAS-certified Master Chronometer with a 60-hour power reserve. Most replicas use a Miyota 9015 or an Asian 2824 base, sometimes with a rotor dressed up to pass as an Omega. Do not judge by the sweep alone, since both beat fast enough to look smooth in a still photo. Judge the finishing you can see. Fake co-axial decoration tends to look like a decal rather than a machined surface.
Before You Pay
- Ask which movement it is, with the base caliber named.
- Ask for unfiltered photos: front, back, and both lugs.
- Ask for a lume shot taken after 30 seconds of charging.
- Ask where the bezel triangle lines up at 12.
- Ask about returns, and pay in a way you can dispute.
Price Bands
Under $100 you get a flat dial, a tinny bracelet, and a movement that will drift. Between $150 and $350 the gradient starts to look right and the case gets real bevels, which is where most buyers should live. Above $400 you are paying for a better bracelet, a sharper caseback, and a movement a watchmaker can service. None of that makes the watch genuine, and no seller should tell you otherwise. What you are buying is how it looks on the wrist and how long it keeps time.