UBB.threads Forums Edged Weapons SA & NSKK Dagger Forum Questions

Hi new to the group and trying to find info on the dagger my father in law got.
The info I have collected so far is that it is a SA dagger with the eichcorn (dont know the spelling) and Sw mark.
The thing is the blade is all black and not shiny like all the others I have found. I have more pictures of if someone needs to see more to help me find out about the dagger. On the inside of the scarab it is marked WE.