Look for the marks, you can google for those. Real silver will have a marking(european), American will have mark, 925, or sterling on it.
Oh look..I linked for you.
Silver hallmarks - Wikipedia, the free encyclopedia
Online Encyclopedia of Silver Marks, Hallmarks & Makers' Marks
Guide to World Hallmarks I - Encyclopedia of Silver Marks, Hallmarks & Makers' Marks
Online Encyclopedia of Silver Marks, Hallmarks & Makers' Marks - Overview
British Sterling - English Hallmarks, Irish Hallmarks & Scottish Hallmarks
Don't like those...Google is your friend.
Hope it helps, I'll keep to myself who you should sell it. As always...YMMV
Sirscrapalot - 'Classic.' A book which people praise and don't read. - Mark Twain
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