1970 D Roosevelt Dime - ERROR - EDGE clamshell NOT DAMAGE. Has Ridges Inside. Looks and feels like two half put together with something inside. Clamshell, off center with reverse side errors of a 1968 Flames. Dime is light. The Weight 2.13g, average weight of dime is 2.27g. Stamping Rare coin I haven’t seen another like it. Extremely rare find for any collection.