Khanda swords with wootz blades are not uncommon.
One can see some on Oriental-Arms website.
http://www.oriental-arms.co.il/photos.php?id=3351
Some were sold also by Auctions Imperial, some by Czerny's
https://www.liveauctioneers.com/item...n-khanda-sword
https://www.liveauctioneers.com/item...ury-provenance
But I agree that your example has a very nice age patina that is worth keeping.