Brunei
Sultan Hassanal Bolkiah copper-nickel Mint Error 20 Sen ND (1977-93) MS64 PCGS, cf. KM12. Double-Headed Error. An engaging selection that was struck with two obverse dies, showing the head of the Sultan surrounded by legends. Rare and possibly unique, sure to interest collectors of mint errors.
Estimate: 1500-2000 USD