Watch List notes:

BULGARIA: Alexander I, Prince, 1879-1886, AE 10 santim, 1880-OM, KM-E1, pattern issue, crowned Arms on mantle below national name // rose wreath encloses denomination, ESSAI, ligate OM below, mintage of only 8 pieces! PCGS graded Specimen 64 BN, RRR. The OM mintmark stands for Oeschger Mesdach & Co, a French firm that minted coins for several countries from the 1860s to 1880s.

Estimate: 1,500-2,500 USD