PART V. Planchet Errors:

Bi-metallic Errors:

Ring accidentally punched from solid coin

Definition: Bi-metallic error coins are restricted to foreign countries. These coins may experience any of the many types of striking errors listed in the Error-Variety Ready Reference however, one must understand we are dealing with two components, a ring & a core. Any number of exotic possibilities or combinations of die varieties, die errors, planchet errors & striking errors can be found on bi-metallic coinage.

An incredible occurrence; a previously struck Hong Kong one dollar coin (solid) was center hole punched creating a morphed outer ring. This ring was then joined with a core and struck by two pound technology dies from Great Britain.