Russia
Nicholas II Proof 15 Kopecks 1913 СПБ-ЭБ PR64 PCGS, St. Petersburg mint, Bitkin-139 (R1), KM-Y21a.2. Obv. Crowned double-headed Imperial eagle. Rev. Crowned date and value in wreath. Mottled gold and russet toning with boldly struck devices. As with the previous 10 Kopecks, all of this very rare issue that we have seen have been Proof strikings.
Estimate: 2500-3000 USD