Valuation Please

I have been given a bottle of Grant's Royal 12 Year Old Whisky. I'm not sure how old it is but the label states its 70% proof and the bottle contains 26 2/3rds Fl. Ozs. It looks to have a cork stopper with a plastic top with a grey coloured seal that shows 'Glenfiddich Stand Fast'. The bottle is triangular in shape and has a black and red ribbon around the neck held on with a red seal which says 12 Year Old.

Does anyone have an approximate value?

Thanks.

[blenderm]

This was a brand that was very common from the 50's up to the 80's/90's. Your bottle seems to be from around the 70's and, as a blend, doesn't really have any real value unless there's someone who is looking for it. In the auctions blended whiskies only sell for around the $25 to $30 mark.
Drink and enjoy
Slainthe

Thanks for your reply. Much appreciated.