My latest addition to my British helmet collection. A MKIV shell, a bit worse for wear I admit, but with the markings for the RAF Police and sergeant stripes on both sides of the exterior. Liner is missing but it does have the Wartime type dark chocolate brown colour. The only stampings on the shell appear to be a capital H ( not shown in pictures). The best part is that it was found locally here in Gibraltar , by my brother in law, and gave it to me. I like it but opinions please.