I cant really help any mate with any I'ds etc, Sirstropalot was the hone identifier not me mate i would have a clue either

but with the blade wear, my understanding is that there shouldn't be a bevel like a Str8 or knife,
as the the whole face is honed, hence the large wear area on the back, which would be more hollow as new I believe
I think it's Glen's (GSSIXGUN) kamisori honing video that shows how it is about a 7 to 1 back to front honing ratio instead of equal both sides like str8s