Old bottle Pinch Scotch

This bottle of Scotch Haig&Haig Pinch has been around in my family since I was a small child and I'm 60yrs old. My aunt and Uncle had a private bar and now I have inherited the collection of Decatur's, old whiskey and anything related to to bars. I really do not know what to do with them and would like to find out value or how to store them. I've been looking on-line for information on trying to date the bottle and wondering if the Scotch is still good. The bottle has a Michigan seal on it also.