Variations in text on caseback? (Seamaster limited edition); Omega website vs real-world

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Learned Omegaphiles,

How much variation do we see, on modern Omega LEs and otherwise, when it comes to case back text? And is the Omega site a reliable reference for checking such things?

The reason I ask: I find this listing on Chrono24 for the rather scarce platinum heritage SM300 (official Omega site link here). The seller is in Japan and has a very strong rating---let me be clear, I am not slandering this person or questioning his/her honesty as I have no basis for doing that, and even if the watch is inauthentic, he/she could be selling it in good faith. (End disclaimer.)

I note a few little discrepancies between this watch and the website pics, of the sort a savvy buyer would want to be sure of before dropping 45k on a watch.

The phrase "LIMITED EDITION" which does not appear at all on the photos on the official Omega site. And the orientation and arrangement of, say "Si14" and "300m/1000ft," which do appear in the official photos but in a different relation to each other. At the center of the gold rotor, the official Omega site has "750" (the same as I find on the gold rotor on my AT), but the seller's watch has "Au750."

The watch generally looks right to me (I think...) but these seem like question marks. That said, a while back, DavidSW (certainly a trusted seller) had this one for sale that had the same markings as the seller's watch. So maybe the anomaly is the website picture? Should I not use the website pics as a reference?
 
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Let me add: I’m not currently looking or in a position to purchase this watch—I’m still in the education phase for the model.
 
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Don't trust the Omega website. Their watches are renders. I've seen images of the movements oriented upside down vs the real watch, which I've contacted them about and they fixed it. Two weeks ago, I contacted them to fix some errors where they mistakenly listed several Planet Ocean Ti watches as Grade 2 Titanium when in fact they are Grade 5. The same watch on rubber would show Grade 5 but on bracelet, Grade 2. Looks like they fixed it this week.
 
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The Omega website can be one point of reference, but it's always possible that there will be an evolution in what comes out of the factory. In the case of the kind of purchase being considered here, the reputation and trustworthiness of the seller would be the single most important factor.

I'm just thinking out loud, but it would be a pretty effective security measure if the manufacturer published images of one configuration, but actually produced something slightly different, so that if items showed up in the marketplace looking exactly like the published images, it would be an indication that the items are counterfeit.
 
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There are no photos on the Omega website.

as noted they are renders and as such are not to be used as verification examples of the production product