I need advice on the age and value of a old bottle of White Horse Scotch Whisky

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I have a sealed bottle of White Horse whisky in mint condition that was given to my father-in-law on his wedding day 53 years ago. It's been tucked away in a cabinet ever since, but I was told the box was tossed only about 5 years ago and then again stored in a cabinet. The (serial?) number on the front label is 1030594. No clue if it can be traced with that or not. Doesn't show signs of evaporation. Can someone tell me a possible value of this collectable and it's potential lifespan. Thanks