Watch List notes:

BULGARIA: 20 Leva (1988) in silver (0,500) commemorating the 100th Anniversary of Sophia University. University above spray, denomination and date below on obverse. Man, moth and kite, dates at left on reverse. Inside slab by NGC "PF 66 ULTRA CAMEO / UNIVERSITY ANNIV.". Cert number: 6389132-095. (KM 173) & (Nikolov 216).