FDC
Bulgaria, Michel BLOCK 106, Cover
1980. BULGARIA. SECURITY IN EUROPE. Block on FDC 1.10.1980.
Bulgaria, Michel BLOCK 106, Cover
1980. BULGARIA. SECURITY IN EUROPE. Block on FDC 1.10.1980.
Bulgaria, Michel BLOCK 53A, Cover
1974. BULGARIA. SECURITY IN EUROPE. Block on FDC 29 x 1974.
Bulgaria, Michel BLOCK 53A, Cover
1974. BULGARIA. SECURITY IN EUROPE. Block on FDC 29 x 1974.
Bulgaria, Michel 145-150, Cover
1920. Wasov 6 ex. FDC PLOVDIV 20. X. 1920. Unusual.