Unusual Panabas

[drac2k]

I got lucky recently and I was able to acquire this panabas and add it to my small but growing panabai(?), collection.It measures 32" long, the blade is 20" by 3.5" at it's widest and 3/8" thick at the base of the spine.
What makes it unusual for me is the inserted metal bar near the tip, the inlay and the centipede or serpent carved in the blade on both sides.
It is very heavy and sharp and try as I could I have been unable to find a similar example.