This stamp was issued by the Free City of Danzig in 1920, shortly after the territory was established under the Treaty of Versailles. It features the city’s coat of arms with a crowned cross, framed by a floral design and inscribed "Freie Stadt Danzig." The 10 Pfennig value, printed in green, was part of the first definitive issues used for everyday postal needs. Postmarked examples like this one are highly sought after, as they represent an important period of interwar philatelic history. A key piece for collectors interested in Danzig, German States, and Treaty of Versailles-related postal issues.