M 38 Feldmütze for the signals troops in the armored units of the Wehrmacht
File:WW2 German police visored-peaked field cap (Feldmütze), single button front closure and metal National emblem-insignia. Lofoten Krigsminnemuseum (War Memorial Museum) Svolvær, Norway 2019-05-08 DSC00405.jpg - Wikimedia Commons
Original WW2 German M34 Cap - M34 Cap for Sale | Gettysburg Museum