Glenfiddich Pure Malt Scotch Whisky

i am trying to age and price a bottle of Glenfiddich Pure Malt Scotch Whisky. The container and bottle have never been opened and it is marked with 5231 stock #10.

The container is black with a stag head at the top, a gold label around the center and the Glenfiddich crest at the bottom. a relative of mine (age 95) gave it to me. If you have the time can you point me in the right direction.

Thanks -
Rickey Doerre