Made by global armour systems, this helmet came ou of a lot of surplus police helmets in the UK. This one does not have a label. but the size appears to be a medium. Should fit well for 57cm or smaller. (I have a 58cm head and this is just a little too small).
I have replaced the chinstrap with a Ops Core H nape, and the pads are now a set of brand new US army issue pads.
Helmet has some skuffs and a few chips in the paint.