1979 Pauillac

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I was given a bottle of '79 Pauillac Grand-puy Ducasse and have just popped the cork. Reasonably clean cork and filtered it into a decanter.
What should I expect from the taste?

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Not so from the Pauillac i'm afraid. Although it looked good, the taste wasn't up to speed.
I resulted to a younger French Syrah.

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The last bottle of the consignment is a very torn label.All I can read is Du Chateau Martine. Societe civile Grand cru.
Proprietaire a LIBOURNE.
The date is also missing although I would say it is between 1976 and 1982.