Indian Silver Khanjar - any thoughts?

[Osca]

Hi all - I was hoping to find out any additional info about this Indian Khanjar.

My mother was gifted it in the 1950s, I believe in Hyderabad.
It was pretty much discarded in the attic ever since - until I got interested in antique arms around 10 years ago and retrieved it.

I've showed it to a couple of specialists years ago, who suggested 18th century Southern India. They also noted the handle & scabbard was solid silver and the gold koftgari, makara finial.

I'd be delighted if anyone could give any further observations, to add to it's story.