what is the value of my 1966 bottle of cordon rouge/mumms champagne? I understand 1966 was an excellent year.
james derren

Really depends on how it's been stored and other providence.

Admittedly the market for single bottles, unless they are top Chateaux from amazing vintages, has been hit extremely hard by the financial melt down.

While 66 was a good vintage (9/10) it is well passed it's best drinking wise.

To give you some idea of value have a look here: 1966 Champagne : Wine-Searcher.com , BUT you're likely to be in the lower end of these prices.