The workmanship on the OP’s kora is typical of Indian decorative “weapons” sold over a period of many years. An illustrative group is from the section headed “Military Decorations” in the 1927 Francis Bannerman catalog.
A “Goorka knife” from the same source exhibits characteristic decoration and fanciful description.
Blades are invariably made from flat stock with minimal taper.
Compare the OPs "kora" with a genuine Indian sacrificial kora on Artzi's site:
LINK