Help identifying an India Princely State coin (Newanagar?)

This coin is silver, about 15mm and 4.8 grams. The obverse looks like Nawanagar KM# 10, but the reverse is very different. Any ideas?

There are several silver Kori coins from Nawanagar in the Zeno database that match yours

https://www.zeno.ru/showphoto.php?photo=119312

https://www.zeno.ru/showphoto.php?photo=119320

https://www.zeno.ru/showphoto.php?photo=60733

https://www.zeno.ru/showphoto.php?photo=201601

All of these are identified as KM#5

Neither your coin nor these match the photo of KM#5 in my book "South Asian Coins and Paper Money 2013". However, there is considerable variability in the coins of Nawanagar, many of which were produced over a long period of time, so I would go with the KM #5. The date is frozen at (9)78 and there is a depiction of a katar (traditional fighting knife) at about the 5 o'clock position on the second photo.

Thank you very much for all this great information. Very helpful. And very interesting. Regards, Drew