I do wish I had saved the details of this knife. Cannot even remember where I found it. But here are two more pictures. The knife looks late 1960s... therefore the handle should either be ivory or Delrin. The handle just doesn't look like ivory, but it does seem to have a grain.. which could be an effect of carving I suppose. Or it is an oddball ... with an experimental handle material, or old blade handled in white micarta or something at a later date. Interesting knife for sure... Have not seen other handles in this configuration.