Reproduction WW 2 German Navy Kriegsmarine, cap badge u-boat service.
Stamped brass consruction.
Can be either pinned on with double prongs or has eyelets for sewing on.
Size is 1 3/8 x 3/4 inches.
Used by, u-404 1941-43 sunk by aircraft in the bay of biscay on 28 july 43 emblem designed by george hogel. ships code name was u-hannibal. first commander was kor.kapt otto von bulow. oak leaves winner. ober lt. schonberg was co when sunk with all hands.   

Listing is for one pin, photo shows front and back.

Repro WW2 U-Boat cap badge u-404 Kriegsmarine Sub Submarine