I'm not an expert, but this seems to be ok.
My guess is an original dial as it appears to be branded " riddels " a hardware store in Belfast. Not sure if they sold it or it was added and given to employees. Or it's from a jeweler with that name as described by the seller. Google search shows it could be either.
It's been lightly polished and the edges are not perfectly sharp. The hour hand seems a bit long and the style does not match earlier examples -1and 2. I can't find other examples of a -3 to compare. Additionally Omegas website does not describe this watch but I'm not sure how accurate it would be in this case.
Price is 875 GB Pounds. Can't help you on price.
Ebay has some better examples of earlier -1 and -2 for less money IMHO.
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