Brockage Also see Brockages and Clashed Dies. A brockage is an error coin. One side (most of the times the obverse) is normal, but the other side instead of the reverse displays the obverse again, incuse (in negative). | Brockage Also see Brockages and Clashed Dies. A brockage is an error coin. One side (most of the times the obverse) is normal, but the other side (usually the reverse) has an incuse (in negative) image of the other side, replacing its usual types and inscriptions. |