Greece
Constantine II Proof 5 Drachmai 1966 PR67 Ultra Cameo NGC, NGC has not mentioned in their description whether this piece is silver, or copper-nickel. From viewing this example, in the holder, it would appear that it is silver. If so, it is KM-PnC81 and is also a pattern issue. Fully brilliant, with nicely mirrored fields and heavily frosted devices.
HID02901242017
Estimate: 5000-6000 USD