As already stated by
@X350 XJR the movement is genuine, its a cal. 267 and does not look bad.
The case is a third party case / contract case maybe of some local production - not from Omega.
My thoughts
if the gold purity can be confirmed: I guess there is about 10-12g of 18K gold which would result to about 430 - 515 €
because scrap value for 1g of 18K gold is at appr. 43€ (42.948 to be precise) today.
So the movement for about €100 value is for free, which is a bonus.
At €450 you can give it a go.
👍
Of course its no collector´s piece but there will be no loss.
just my 2 cents...
PS: and its no Calatrava...