Reproduction US Navy WW 2 distinguishing mark for PT boats, variation using the mosquito boat design, rope border. 

White thread machine embroidered on dark blue/black wool.

Used on the dress blue enlisted men's jumper and CPOs jacket. 

Size is 2 3/8 inches round. 

Listing is for 1, stock photos show front and back.
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Inside Rack 34, Shelf D