ITALY
Definately a WW2 or earlier M33, but I am not sure what the hole in the front is for.
(Well, I know now what the hole indicates - Italian collector Bruno Murgia tells me that it indicates a sub-standard helmet issued to non-combatant units.)
Note that there is no sign of there ever having been an insignia stencilled on the front.
Definately a postwar example. Note no hole in front. Obviously tested and found good!
See an excellent article on identifying pre- or post-WW2 Italian M33 helmets at Michele Tagliavini's helmet website.
The canvas chinstrap is a certain clue that this is a postwar production model.