Stack's Bowers & Ponterio
September 2021 Hong Kong Auction 2-7 Oct 2021
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2) Mint Error--Struck on Wrong Planchet--10 Cents, 1978. London Mint. PCGS AU-58. KM-36. Struck on a Hong Kong 20 Cent planchet.
3) Mint Error--Struck on Wrong Planchet--50 Cents, ND (1977-80). London Mint. PCGS MS-64. KM-41. Struck on a Hong Kong 5 Cent planchet.
Estimate: $200 - $400