This stamp was issued by the Free City of Danzig in 1920, during the early years of its postal independence following World War I. It features the city’s coat of arms—a crowned shield with two crosses—flanked by two heraldic lions, a strong symbol of Danzig’s sovereignty. The bold "100 Mark" denomination reflects the inflationary period of the early 1920s. Printed in deep green with fine detailing, this issue is part of the first definitive series of the Free City. A historically significant stamp for collectors interested in post–World War I European territories.