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There are so many variations, but that one is a re-dial afaik
This matte grey/blue dial enters my dreams sometimes
https://omegaforums.net/threads/omega-constellation-168-017-grey-blue-dial.97481/
Here was an interesting thread about a green one. The balance of opinion was that it was very unusual but probably genuine:
https://omegaforums.net/threads/thoughts-on-this-green-dial-c-shape-constellation.116994/
I think I've seen an oxblood one online too.
The key with both seems to be that there's a pronounced two-tone to the colouration - unlike the green redial I posted above.
I think I've discovered a new area of interest if the black pie-pan never works out...!