I'm clueless

[hotwine]

Welcome to the board, Leilei. Doubt seriously that there's any value to those old bottles, except as curiosities. However, a Google search for Dino Barengo found him easily; go to http://www.mokelumneoaksvintners.com/index.cfm?id=424&fuseaction=browse&pageid=24
and look under Lodi-Sacramento Wineres. It looks like he might still be in operation and moving back and forth between Sacto and Reno areas. If so, you might be able to contact him through the Website listed.

As to homemade wines lasting 60 or so years... it's been my experience that they stand a good chance of surviving a long time because of the common practice among home winemakers of heavily chaptalizing their wines, that is, augmenting the sugar content of the "must". I have some homemade wines in the 25-30 year range that are doing just fine. But if you decide to try one, be very gentle with the bottle so as not to disturb the sediment, and decant it carefully. I use a coffee filter to remove the sediment, and quite commonly have to use a second filter because the first loads up so quickly. Have fun.