lieutjg-vincent-g-quillen-usnr-1943 The US Navy Ball Cap was very popular with the Navy and Marine pilots of WWII. These were non issue private purchase items usually obtained from the base PX. It was common for the name or number of their unit to be sewn or embroidered across the front. Original examples exist in a variety of colourways and fabrications. The most common being the navy wool with 6 panel construction. On or off duty, if they weren