I found a long [40"] borang ? in a pawn shop, the blade starts out wide and curves down right from the handle then curves back up to a long thin point.Handle is horn in the traditional cockatoo head with brass hilt. I want to find a site that shows differnt styles of blades so I know what type this is and about what value it has. It appears to be made well and has a leather sheath. Only bad point is some one tried to polish it with a dremel tool. Can anyone help?