Third Reich RLB Luftschutz Semi-Postal Stamp

This is a German philatelic item from the Third Reich period (circa 1937), specifically a semi-postal or charity stamp issued to support the 'Reichsluftschutzbund' (RLB) or State Air Raid Protection League. The stamp features a portrait of a stylized air raid warden wearing a characteristic M38 'gladiator' style helmet and holding a shield embossed with the 'RLB' initials and a swastika emblem. The text 'Deutsches Reich' appears at the top, with 'Luftschutz!' at the bottom. It exhibits a brownish-sepia monochrome printing on perforated paper. Notably, there is a visible circular postmark or cancellation stamp over the right portion, which includes the number '3' and portions of German text, indicating it was likely used in a postal capacity or as a contribution receipt. The edges show standard serrated perforations, though some appear slightly blunted. The paper surface shows mild yellowing consistent with age, but no major tears or deep creases are immediately apparent. As a historical artifact, its value is derived from its association with civil defense propaganda during the World War II era in Germany.