horse blanket noun3 •A blanket placed underneath the saddle of a horse. •A blanket worn by a horse (saddled or unsaddled) in cold weather. •(US, slang) Paper money consisting of large-sized notes or bills, printed from 1861 to 1928.https://web.archive.org/web/20070409012812/http://www.brokencc.com/buyfaq1.php Typically your small size (the same physical size as regular money, as opposed to the old horse blankets) silver certificate is worth about 5% more than face. formshorse blankets