1973 Mouton-Cadet?

[Stormcloud82]

Hello,
I'm new here and I have a question. My future mother-in-law was cleaning out her garage and rediscovered a bottle of wine in a wooden box. It is a 1973 Mouton-Cadet Bordeaux. The box says it is a 192 oz bottle, however, the bottle says 202.8 oz. She is interested in finding out the value. If anyone can give me any idea, that would be great.
Thank you,
Rachel