My M16 helmet has a size number 64 stenciled in black colored ink or paint on the inside rear skirt. Why is that?
Sometimes helmets were refurbished in field repair facilities. They would be repainted (either by spray or with a brush) and in some cases, a new liner installed. In the case of a repaint, often times the stamped maker/size mark was obscured so it was the practice to re- mark the size with a stencil in the rear skirt.
