Way back in 1863 a Bolivian Silver 8 Soles coin was struck and somehow released into circulation bearing an error on its reverse. So you can distinguish the error on the coin here's an 8 Soles that was struck without an error. (Coin Archives image): http://www.coinarchives.com/w/lotviewer.php?LotID=1004446&AucID=931&Lot=8077&Val=a2e572888c12ed2270cb416e9737f32c What is the error? On that 1862 8 Soles, you just looked at, the spelling "BOLIVIANA" is correct. On the error coin struck in 1863, note the spelling is "BOLIVANA." Click link to see (Coin Archives photo): http://www.coinarchives.com/w/lotviewer.php?LotID=1004447&AucID=931&Lot=8078&Val=d1221cc32185b7ae7a663c00272a0a93 Did you know? Clinker