THE HANDLE ON YOUR EXAMPLE IS A TRADITIONAL FORM I HAVE SEEN BEFORE BUT THE CARVING ON THE SCABBARD IS ONE I HAVE NOT SEEN.
A CLOSE UP ON THE FORTE OF THE BLADE MAY BE HELPFUL FOR IDENTIFICATION IF IT HAS ANY DESIGN OR CARVING , IF ITS JUST RUST NO PICTURE IS NEEDED. A CLOSEUP OF THE WIRE WRAP COULD HELP TO DETRERMINE IF ITS NEW OR OLD AND A CLOSEUP OF THE SCABBARD CARVING MAY BE OF USE TOO. THE BLADE LOOKS TO BE A GOOD HEAVY ONE IN A PROPER MANDAU FORM.
NOT MUCH HELP BUT THEN I AM JUST A BEGINNER ONLY BEEN COLLECTING THEM FOR 30 YEARS OR SO

AS FAR AS DAYAK WEAPONS ARE CONCERNED THATS A BEGINNER UNLESS THAT IS YOUR ONLY INEREST AND YOU SEARCH TIRELESLY FOR INFORMATION.