50+year old bottle of Champagne

[Unknown]

It was sugested to me to try and get the attention of Mr. Tom Stevenson by posting on the champagne thread. I have recently aquired a bottle of champagne labled "Monopole Red Top." It was made by Heidsiek & Co. in Reims. It still has its straw bundling and a large red diagonal marking (Over the normal lable) that reads "Reserved for Allied Forces" I'm trying to figure its value. Any help would be greatly appreciated.
U