Perth Mint Vintage 1oz Proof Medallion (blue tone), Circa 1989

Struck by the Perth Mint to celebrate 90years (1899-1989), this proof 1oz medallion shows signs of severe toning and a beautiful blue bloom (pictured), Circa 1989

Mintage of Black Box issue 500 (R4), Very Scarce <100
Australian Poured Ingots p181