Watch List notes:

BULGARIA: 5 Leva (1963) in silver (0,900) commemorating the 1100th Anniversary Slavic Alphabet. Denomination above shield on obverse. St Cyril and St Methodius standing with dates below on reverse. Inside slab by NGC "PF 66 / SLAVONIC ALPHABET ANNIV.". Cert number: 6633694-008. (KM 66) & (Nikolov 93).