Hi, Sherry is generally over 17% volume which means it is self preserving. There are Solera style sherries which are 60 or more years old and are beautiful, check my supplier for 1941 Sherry, gorgeous http://shop.purewines.org/port--sherry-136-c.a sp
Thanks for that. Mine isn't quite so classy as some of those you mentioned, just a Croft Original but still 17.5% so from what you say, I can crack it open and enjoy?