Canada
Victoria Specimen 50 Cents 1871, KM6-H2, SP61 PCGS. Upon rotation, this coin's dark-gray patina explodes in an all-out rainbow, painting the Queen in a wash of color that is beautiful beyond words. Light evidence of handling is apparent but essentially a non-issue since this is currently the only PCGS certified Specimen of this date. Unique does not even begin to describe this piece, nor the opportunity to own one.
Estimate: 9000-12500 USD