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81[Arkusz znaczków podziemnych NSZZ "Solidarność" - CFDT] . Sheet of unofficial stamps Solidarity-CFDTby Poczta Solidarność.“…Sheet, with "Poczta Solidarność" imprint, released in cooperation with Confédération française démocratique du travail (CFDT) in support of the Solidarity from Mazowsze region, has stamps grouped in pairs. …”
Published 1987
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