Welcome to the forum!
I am sure that someone more knowledgeable with Indian arms can tell you more ,but my gut feeling is that this katar is probably from the early to mid 19th century {1800-1850}.There is a lot of inlaying still intact and while it is possible that you katar was well cared for, inlaying is usually the first thing to go on a knife,it gets worn ,rubbed and scratched off fairly easily.Nice katar either way.