Coteaux Champenois ~70s-80s

Unknown vintage, but possibly late 70s or early 80s based on the label. And this one is even more dead than the G.H.Mumm Cordon Rouge ~70s-80s NV. Onion soup with no body and no sense. A still wine from Champagne that has long since stopped being wine and started being a conversation piece - and not a particularly interesting one.