Hi Roanoa and thanks,
I agree ...the blade profile ..the handle are almost identical. I would like to 'repair' the pommel ..so it is appreciated that you gave the dimensions. The view of the top of the disc would be helpful
I'm not certain as to the handle being horn/bone ...so ebony/ (ivory/bone) could still be a possibillity
I also wouldn't be surprised at the 1930's as a possible date either.