The box is original and correct from around 1950. It is exactly the same as the well know early red Constellation boxes, except it is green. You can see an example of the Constellation version with the insert in Mondodec's article here:
http://www.mediafire.com/file/61zvm9hfz2r1b3n/Omega Constellation Boxes.pdf
I have the same exact box (also without the insert), except mine just says "Omega Precision Watch" inside.
It's a nice one,
gatorcpa
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