Postcard Signed By Early Prominent Socialists at the Sozialdemokratische Parteitag Jena, 1913.
Jena: 1913. Photographic postcard. With the official stamp of the convention. The signatures are written in pen and pencil. With the original envelope, addressed in ink by Buchinger. 139 × 87 mm. Postcard with signatures of ten prominent figures of the international leftist, and social democratic movement, among them Karl..... More