Watch List notes:

BULGARIA: 10 Leva (ND 1963) in gold (0,900) commemorating the 1100th Anniversary of Slavic Alphabet. Denomination above shield on obverse. St Cyril and St Methodius with dates on reverse. Inside slab by NGC "PF 65 ULTRA CAMEO / SLAVONIC ALPHABET ANNIV.". Cert number: 6633597-021. (KM 67) & (Nikolov 94).