Aged Italian Wine

[HeavyD]

Recently a friend of mine moved into a house. Their was already a bar there that contained a case of wine. He doesn't drink wine, so he gave the case. I opened it up and their is 3 bottles in there. The names and years of them are:
Vintage 1968 Masi Valpolicella
Vintage 1971 Masi-Soave
Vintage 1969 Masi-Bardolino
Can anyone give me any information on this wine? Does anyone know if it tastes good, aged to long, or if it is something that I should hold onto? Any information is very much appricated. Thanks