Peter is probably right but there are two versions of the left looking kokoshnik with big figures. This type of kokshnik was used 1899-1908. Anyway, is it possible to "see" what Cyrillic letters are behind the kokshnik's neck. That could help to identify the assayer and town. That again could help to try to identify the maker or deem the object to be a fake. As for now a rather difficult case.