Watch List notes:

BULGARIA: Alexander I, Prince, 1879-1886, pattern AE 10 santim, 1880-OM, KM-E1, crowned Arms on mantle below national name / rose wreath encloses denomination, ESSAI, ligate OM, below, thin scratch across reverse, Unc. The OM mintmark stands for Oeschger Mesdach & Co, a French firm that minted coins for several countries from the 1860s to 1880s.

Estimate: 1,400- 1,600 USD