Thanks for your illustrated clarification and opinions Mans. I am also inclined to place Oversky's keris in East Jawa or Madura. The sloping lean of the gandik seems to imply this as well. I would think though that in it's current condition and missing it's gonjo (amongst other things) it would be somewhat difficult to place within the tangguh system.
Oversky, i am afaid i do not see anything definitive that would identify this bit of pamor in your keris as being meteoric ore (aerosiderite). We have had may long threads on the difficulties of IDing such material in keris. You might want to use our search feature to find them.
This is not to say that it isn't possible that the material could be meteorite, though i am not sure it is likely.