1979 German wine..any value? any good?

[jchrise]

Hello. I am new at wine appreciation. Recently while cleaning out my cousins cluttered garage, I came across 4 bottles of the following German wine labeled as follows:
RHEINHESSEN 1979 Wefthofener Bergflofter Silvaner Spatlefe
other markings: SICHEL, Erzeugerabfullung Heinz F. Eller, Westhofen.

Does this wine have value? Any info would be greatly appreciated.