1982 Commonwealth Games 50c Ramstrike Error UNCA Ramstrike error happens when a coin blank is misaligned during striking, resulting in sharp, raised edges. This eye catching mistake is especially striking on 12 sided coins like the 50 cent piece, where the error creates dramatic, protruding metal lugs around the edges. This coin is uncirculated but does exhibit some minor environmental damage due to improper storage on the obverse (heads side) and has been priced accordingly.