Have these turned to vinegar by now?

[etatz@juno.com]

We were given some red wine as a wedding present 24 years ago but have never opened it. We have been told it is probably no good, but I just wanted to check before I opened it. I don't know if I am providing the correct information but I'll start here:
The first is Chateau Potensac, Medoc, 1973 with the words Delon Liquard on the label.
The second is Larose Sieujean, Medoc, 1972.

Both have been stored on their sides in a basement, so obviously not rigorously controlled temps. They have not been moved for the last 15 years, (until tonight).

Thank you.

for the last 15 years.

[Bucko]

72 & 73 were horrid vintage years.........