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bulgaria -
1879-1888 | 1889-1898 | 1899-1908 | 1909-1918 | 1919-1928 | 1929-1938 | 1939-1948 | 1949-1958 | 1959-1968 | 1969-1978 | 1979-1988 | 1989-1998 | 1999-2008 | 2009-2017 |
1977-06-07 International Writers Conference, Sofia
perf 13;
MI#2607
SC#2410
LC#2669
480 000 copies,

Complete set (1) 0.17
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set MNH
n.a. used


Variations, Errors, FDCs
st..Tourism mini sheet 1.37
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n.a. used
60 000 copies,