Most definitely a vintage champagne:
http://uk.news.yahoo.com/22/20100717/tod-oukoe-uk-finland-wreck-champagne-1a5e080.html
A group of divers exploring a shipwreck in the Baltic Sea have found bottles containing what is thought to be the oldest drinkable champagne in the world, made in the late 18th century.
http://uk.news.yahoo.com/22/20100717/tod-oukoe-uk-finland-wreck-champagne-1a5e080.html