Third Reich Air Raid Protection MiNr. 643 MiNr. 644 MiNr. 645 This series was issued on 3 March 1937. It depicts a German soldier holding a shield with the Air Raid Protection insignia. Set Date(s) 3 March 1937 Watermark(s) None Album Page(s) Air Raid Protection MiNr. 643 MiNr. 644 MiNr. 645 This series was issued on 3 March 1937. It depicts a German soldier holding a shield with the Air Raid Protection insignia. Set Date(s) 3 March 1937 Watermark(s) None Album Page(s)