Russia
Nicholas I 20 Kopecks 1830 CПБ-HГ MS66 Prooflike NGC, St. Petersburg mint, KM-C158, Bitkin-139. A steely-gray, hazy, light golden tone envelops the surfaces, subtly revealing highly mirrored surfaces from beneath. An exceptional gem of resounding brilliance.
Estimate: 3000-4000 USD