This is a helmet found in Bosnia near or in the village of Trnćine. Now it’s copy is held in Belgrade museum (Serbia).
The lower part of the forehead cross was hypotetically cut of sometime ago. Other way it would be a very strange figure.
Price is without the chainmail but mounting it to the helmet is for free from our side 🙂

http://truehistoryshop.com/shop/helmet-trnchine-bosnia/