It is a flip over double struck coin. Modern ones exist also.
They can also happen in different denominations.See link blow.
http://cgi.ebay.com/2000-FLIPOVER-S...RR_W0QQitemZ300196294998QQihZ020QQcategoryZ524QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
They can also happen in different denominations.See link blow.
http://cgi.ebay.com/2000-FLIPOVER-S...RR_W0QQitemZ300196294998QQihZ020QQcategoryZ524QQssPageNameZWDVWQQrdZ1QQcmdZViewItem



















