Apparently a weapons license was required from the police, which needed to be produced at customs, along with a hefty customs fee. From experience I know that it's virtually impossible to procure said license, since all manner of supporting documentation is required. I just didn't want to go through the hassle.
Then again, a 21" Kumar Chitlangi sailed through without issues... apart from the customs fee. Go figure!
I now rely on friends in the States for my knife related needs, who visit India.
My last was a superb 18" Pach (5) Chirra at just 18 ounces, sharp as heck, by Ram Kumar. This one went to Edmonton, Canada then onwards to the Arctic Circle where a friend inadvertently packed it in his luggage and flew it in a plane. Then he flew commercial to India.
Anyway I wonder if your Thamar Teen Chirra will have similar adventures!