Third Reich The Blue Ribbon MiNr. 779 This stamp was issued on 20 June 1941 to commemorate the German Grand Prize of Three Year Olds in the Blue Ribbon in Hamburg, 22-29 June 1941. Set Date(s) 20 June 1941 Watermark(s) None Album Page(s) The Blue Ribbon MiNr. 779 This stamp was issued on 20 June 1941 to commemorate the German Grand Prize of Three Year Olds in the Blue Ribbon in Hamburg, 22-29 June 1941. Set Date(s) 20 June 1941 Watermark(s) None Album Page(s)