Hi Miguel, you are welcome.
Research can be hard work, and usualy you hit the wall a few or many times, but try to look at it this way. Every time you research, wall or not, you learn something, maybe not what you are looking for - but you still learn something.
Have you tried to dig into the Ellora Caves? They were made from the 6th to the 10th century, and represents three different religions. The paintings and statues are said to represent all the weapons used in this period. Maybe you will find ssomething which will give you a pointer.
When I researched how old the katar is, I read about the caves, and saw that no katars were shown/mentioned, so I knew that the katar was not that old, or at least not used in this area at the time.
Good luck.
Jens
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