An extract would be of no help determining dial originality. Omega lost a lot of their information on the 321 movements and many newer extracts issued just tell you when it was delivered and no longer tell you what case the movement originally came in.
And AFAIK, the painted logo is incorrect for the 321 - the dials that came with that movement came with the applied and not painted logo. And
Kringkily is probably correct regarding the dial origins - I am not aware of an omega dial that came from the factory in exactly this configuration - combination of the font style, the absence of the word "professional" the lume marker style and the tritium marking - so I think alterations may have been made to it.
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