Reproduction WW 2 German u-boat cap badge.
u-777 used this device. 
Stamped brass with 2 prongs on back for fastening.
Size is 1 1/2 x 1 1/16 inches.

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

Repro WW2 German U-boat cap badge u-777 Kriegsmarine Sub Submarine

$20.00Price