strange asian brass helmet what is it ?

[Dmitry]

Originally Posted by Stan S.

Russians generally stoped wearing this style of helmets sometime in late 17th century. It is a pretty archaic form but definetely something simmilar to what was popular in Russia during the renassance

There were no Russian helmets per se, imho. The styles of helmets they wore were Turkish-The select few extant examples of princely quality have Orthodox imagery.
Just my $.02