YES! today, i went to Value Village (lol) and i see this helmet and i was all OMG A WAR HELMET because thats what it lookedl ike. now, my mom was all meh, meh about getting it but i finnaly talked her into it and now it's mine! well, i bring it home and my dad did some research and sure enough, it is an official MK4 United Kingdom helmet! another model of WWII helmet in a series of MK1, 2 ,3 ,4 ,5 and 6. :p you can read more on the MK4 and other helmets at: https://www.gostak.demon.co.uk/helmets/unitedkingdom.htm
Pics: (from the above site)
this is what the outside looks like!
and, another weird thing about my helmet and the one o nthe sit