I found this sword and was told it was a WW1 Japanese naval dirk but I cannot find any references. It is very similar to the WW2 Japanese naval dirk, yet noticeably different. It is longer and heavier than the WW2 Naval dirk (which i also have). I am hoping someone here has enough knowledge to point me in the right direction or know what it is. A number of people I have spoken to have never seen this before.
Some details:
3/4 fuller
brass S-shaped crossguard
ray skin wire bound grip
Leather bound Scabbard with engraved brass overlay with gold gilded detail