And you're unlikely to see another too. Very unusual, and downright ugly in my opinion. I'd probably be pushed to say that the eagle has been rivited on post war, as for the paint on the back I'm not too sure about that either. And the liner appears to be a post war version...
This is a fantasy piece, which is why you haven't seen another!
I would steer clear of this helmet. While the shell appears to be an authentic M35, It's got a post war liner (the vent holes in the forehead are a dead giveaway) and chinstrap. I'm afraid the decorations on the outside were added to trick inexperienced collectors out of a lot of their money.
Whatever its just an opinion.