Scotch Whiskey MAster Blenders Pack

Hello, I was hoping someone here might be able to give me an idea about a vintage pack of Scotch Whiskey? Its called the master Blenders Pack consisting of 5 different blends of Scotch Whiskey from Scottish distilleries. The Labels are, GLENFARCLAS, INVERGORDAN, TOMATIN, BRUICHLADIDICH AND MACDUFF. The pack also contains a small bottle of distilled water from a Scottish Loch.

It is my Dad's and it was given to him in the late 60's to early seventies by his boss as a Christmas gift, Just wondering if anyone knows if these are common or rare, $ value or should he just open them and enjoy.

They are all in an unopened condition and have been stored in their box out of direct sunlight for the last 40 odd years. I have a picture of them if anyone would like me to email it to them, just can't upload pics on this forum. Thanks in advance, Ryan.