Lyric discussion by Digi-G 

Cover art for Vintage Wine lyrics by Moody Blues, The

I think Vintage Wine = Vintage Music. I think it's about 1960's music and how he was proud to be a part of it because it was about peace and love.

From '63 to '69 was also the Beatles era (coincidently possibly). But they opened doors for lots of English acts (including the Moody Blues) in that time period.