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Birds in the Nature Reserve "Srebarna"

Bulgaria 1968 / Set of 6 stamps / mint condition / Michel #1836-41 / Yvert #1627-32 Note: The bl..

5.49€

Belovezhskaya Pushcha National Park

Soviet Union 1969 / Set of 5 stamps / mint condition / Michel #3667-71 / Yvert #3528-32 Note: Th..

2.45€