Printed in May 1918, this rare, highly collectible antique postcard commemorates the one hundredth anniversary of Karl Marx (1818–1918). It features striking red-and-black socialist artwork surrounding a central portrait of Marx, with Yiddish text across the banner reading "Workers of all countries, unite!" and the English sub-caption "Karl Marx / One Hundredth Anniversary."
Issued in May 1918 for Marx's birth centennial during the First World War era, this historic piece carries the Allied Printing Trades Council New York City union printer's label (Bug #306) on the reverse, serving as an exceptional primary document of early 20th-century American Yiddish-speaking labor and socialist movements.
The postcard is in unposted and unwritten vintage condition. The front image remains crisp with strong color retention, showing light edge wear and soft corner bumping. The reverse back panel exhibits an old moisture stain on the right portion, along with light surface handling marks and subtle vertical paper creasing near the top center divider. Please review all high-resolution photos for exact cosmetic condition details prior to purchasing.

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