WW2 Polish 11th Signal Battalion Beret Pennant

A Polish pennant worn on a beret, showing a mermaid of the 2nd Polish corps and lightning. Used by the 11th Signal Battalion. 

 Smooth reverse,marked “ALP” (for Alpaca). Threaded nut, spinner missing. 

Good condition as in photographs, belonged to an officer of the 11 Signals Battalion of the 2nd Polish Corps.