What would a 1967 bottle of Alto Cabernet Sauvignon be worth?

Question

And would it be drinkable or collectable??

Hi - I finally remembered to look at the bottle. It doesn't have anything preceding the name Alto. But there is a name in a banner on the label - Pieter Du Toit. Does this help? You can e-mail me at [e-mail]

Answer 1

Please Clarify: Is this Cantinas Alto, Terrazas Alto, Alto Sonoma..... If you could please let me know exactly what is written on the label I could suggest a valuation.