Bulgaria
Alexander I as Prince copper Specimen Essai 10 Santim 1880-OM MS63 Brown PCGS, KM-E1. Struck by Oeschger Mesdach & Co, this is an amazing example of this extremely rare pattern striking with richly-colored, reddish-brown surfaces that show some color variegation on both sides. Scarce, with a reported mintage of just 8 pieces, and highly-desirable in all regards.
Estimate: 2500-3000 USD