This is a photo from a friend from 12 years ago of an instrument he purchased from the maker sight-unseen after correspondence. I *think* the instrument is similar to a moheen veena, but I recall it having a different name. Which I can't remember.
[Edit]It's called a Chaturangui, although this has eight primary strings[/Edit]
According to my friend, it was difficult to tune and find replacement strings for, but sounded great and played well, I think with a bar.
View attachment 1000181
This looks a lot like the instrument used by Debashish Bhattacharya for playing hindustani steel guitar.