It's similar to a repro I own, but it looks like it's better made than mine for all reasons stated above. (The real cairngorm stone question is a good one.)

Whatever it is, unless you got badly fleeced in the price department, I would simply enjoy the fact that you own it and begin looking for a good time to wear it--like to a Burns Supper in a week or so. You can cut the haggis with it.

Congratulations on the purchase either way. It's a great blade and I'm sure you're happy with it.