Drinkable? 1973 Almaden

[jrwpmw]

I have a few older bottles of wine. I'm wanting to know if they are still safe or tastefull to drink! I know about wine getting better with age... But still I want to check and please excuse me for being a newbie!

Regarding storage, they have been in my basement in boxes most of their life, except for the 1973 which I have only had for 10 years.

The oldest bottle is:
Vintage 1973 Special Selection
Alamaden
California Mountain
Gamay Beaujoulais

The other bottles are:
1988
Duna
Amonsieur Henri Sleection
Chardonnay

1988
Barton & Guestier
Chateauneuf-Du-Page