WILHELM CROWN PRINCE (1882 - 1951) German crown prince, the oldest son of William II and the last crown prince of Prussia. Brief T.L.S. on the verso of a real photo postcard of the Prince in formal military attire, sending thanks for a letter, 1937. Boldly signed "Augustus" at conclusion in pencil. Along with a bold signature "Augustus" in purple pencil, penned on a small card. Two pieces, very good.