BULGARIA: 5 Leva (ND 1978) in silver (0,500) commemorating the 100th Anniversary of the National Library. National coat of arms and denomination below on obverse. Statue in front of library and two dates above on reverse. Inside slab by NGC "PF 63 ULTRA CAMEO / NATIONAL LIBRARY 100TH ANNIVERSARY". Cert number: 6634253-007. The slab is damaged at bottom. (KM 101) & (Nikolov 129).