Recently I got into an argument, when was the Yasenovo helmet used? The literature has a firm understanding of 9-10th centuries, but a russian guy told me (without sources, just looking at Golden Horde helmets and telling me that other finds in the grave ar from the 13-14th centuries), that it is much later.
Due to obscurity of russian sources (hard to source them), does anyone have some new info?
Thanks!

![Yasenovo2[1].jpg](files/yasenovo21_678.jpg)