Watch List notes:

BULGARIA: 10 Leva (2006) in gilt silver (0,999) commemorating the Treasures of Bulgaria / Letnitsa. National arms on obverse. Horseman statue on reverse. Inside slab by NGC "PF 68 ULTRA CAMEO / TREASURES OF BULGARIA / LETNITSA". Cert number: 6633778-025. (KM 286) & (Nikolov 360).