Bulgaria 1953a note in p/p

Bulgaria 1953a in present pack, note: surcharged 1 Lev and overprinted Visitez la Bulgaria, airline initials and emblems, MNH. Michel 2230-2233 Bl.39, Euros 55.00. Historical paintings, by Boris Angelushev, Ilya Petrov, P. Morozov, D. Gudjenko. 1973.