English: Reconstruction of the original seal used by the Social Democracy of the Kingdom of Poland and Lithuania. An image of the original seal can be found in the book 'Postacie z przełomu wieków: z kręgu działaczy SDKPiL' (1983) by N. Michta and J. Sobczak, p. 137. Author and the precise date of the creation of the seal is unknown.
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