is this Pink Champagne any good?

[alonzomourning]

I just found a bottle of "Great Western" Pink Champagne produced by pleasant valley wine co., while cleaning out a closet. It was made in 1969 or earlier, as it was given to my grandparents on their 25th anniversary and they were going to drink it on their 50th (neither survived that long). It does not have a year on it. I know very little about wine, especially pink champagne. Is this wine any good? What is it worth? I'm not sure if I should save it for a special occasion, or just keep it as a memento without drinking it.