If I may intervene in this discussion, I think this serial numbers gap is a little bit too much to be legit.
According to some old Omega's data - you cannot find them anymore ns the Omega website, but you can see them here:
http://ialreadyhaveawatch.com/watch-articles/omega/omega-serial-numbers-by-year/) - there could be a pretty huge gap, because old movements could be used as long as about 10 years after their production. A movement with a 6 millions serial number could be used untill 1735. So it could match with a case with a 9 millions serial number, which have been produced between 1935-1943.
But the OP's watch have the following case number: 9 224 490, which, i guess, would imply it has been produced around 1936-1938. So even if we consider the later use of an old movement, it seems a little odd. Of course, one could argue it is only one year difference (1935-1936) and that's only speculation. Well, I agree. But this is the best we can do with the data we have! And with these data, the OP's movement and case
seem not to match.
By the way, it is a good looking watch! Maybe not a collectible one though. Not sure if it is OK to comment the price, so I will not.
To be sure, the OP could buy an extract from Omega, but we could also wait for
@Tire-comedon to intervene! He could tell us if this kind of dial came with this kind of case - I am not sure it did, but Yann will surely know!
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