Value of Canadian Masterpiece imported Canadian Whisky 1966 special edition # 570973?

Hard to say. There's no whisky trading market with price guides like you'd find with baseball cards. Your bottle is worth whatever you can get someone to pay for it and you're dealing in a small, very focused market. Old Scotch does OK, very rare versions if dead distilleries are hit and miss but old Canadian Whisky, really not much of a market. The only price I could find was a secondhand mention of $35 on eBay for a bottle a few years older

If you had a picture of it, it would help to price. There is, like the previous fellow stated, no set market for Canadian whisky. However, if you are looking to sell it, I know a few Canadians (I am one, after all) who could be interested in buying it!