International Stamp Exhibition "ESSEN '78" - Preservation of the Architectural Heritage in Europe Overprinted in Left and Right Side 1978
现在展示： 保加利亚 - （通用）邮票 - 1978 - International Stamp Exhibition "ESSEN '78" - Preservation of the Architectural Heritage in Europe Overprinted in Left and Right Side - 2 邮票.
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