However, Alan writes in his previous post that this weapon is not from Madura. If not from Madura, are there any suggestions from where it could be ?
I would have to agree with Alan that this weapon does not look Madurese. The crown like features on the long "ferrule" area remind me of design i have seen on sikin panjang and rencong so my first thought was either a Aceh or Sumatran origin.