Great Britain
Victoria Proof 6 Pence 1839 PR64 Cameo PCGS, Royal mint, KM733.1, S-3908. Richly toned with vibrant blue iridescent hues that jump out from the surfaces and stand as a bold contrast to devices. If not for the deep toning, a coin that almost certainly would have merited the Deep Cameo designation.
Estimate: 1500-2000 USD