Kayamkulam vaal

Kayamkulam vaal (meaning Kayamkulam sword) is a double-edged sword that was used by the rulers and soldiers of Nair aristocracy (mostly in Travancore), in the Kayamkulam princely state of India. An example is on display at the Krishnapuram Palace Museum in Kayamkulam.

It is said to have been used by the Kayamkulam Rajas in the 18th century.

...
Wikipedia