This is a rare 1OZ PLATINUM Harrington vintage round, not to be confused with the 'scarce' silver and gold types. 

This is the only one known at this time, and is unlisted in Kim Brett's first edition of the book - to be added in the next edition as unique 1 of 1 known. A unicorn. One for the advanced collector, or the Harrington specialist. 

Tests as >999 Pt on XRF, and has verbal provenance to an old Harrington worker. 

Amazing high grade, not cleaned. Can ship to USA but note cost.