WW2 German Army Service Cap for Artillery. Made by the firm HPC (Herman Potthoff) this cap has the crown made from a doeskin material with a lovely saddle shape and sports this firms unique "frischluft" system of a 5 vents cockade with an inside flap to enable the air vent to be closed if required. The cap is in very good condition throughout, just a couple of moth nips and some tracking on the crown alongside some sweat staining inside, as shown on the photos. The leather sweatband has a velvet insert between the band and crown for a better fit plus a perforated pattern on the ...