Looking for some info on Glenfiddich Scotch. I found a bottle of it in the wall of a building here at my business. (I know, right?) It is in a cardboard "gift" tube which had been opened, however the bottle is still sealed! Is there any numbers on the label that would give me an idea of how old this is? Everything I find online has a newer label than this one. The bottle is green and in a TRIANGLE shape. I don't think it's their aged Scotch as it only says "Pure Malt" on it rather than the "12", "18", "21", etc. that are on the current aged bottles. Thanx!