BULGARIA (1940) Tsar Boris III*. Imperforate block of 4. Scott No 369.
AVAILABLE AT $40
BULGARIA (1964) Fertilizer plant*. Imperforate pair. Scott No C110, Yvert No PA 108. Scarce error!
AVAILABLE AT $30
BULGARIA (1974) Soccer players*. Imperforate souvenir sheet (Michel Block 47). World Soccer Championship. Scott No 2171, Yvert No BF45. 1993 Michel catalog 350DM.
AVAILABLE AT $75
BULGARIA (1979) Receiving station*. Imperforate souvenir sheet (Michel Block 88). Telecommunications Day. Scott No 2584, Yvert No BF81. 1993 Michel catalog 70DM.
AVAILABLE AT $20