When I was a student in college way back in the early 70's I purchased a bayonet at a estate sale. Now I would like to know what I really have. The blade is 10" long from point to guard and is marked SIMSON & SUHL. On the guard it is numbered # N 90xx. The scabbard is leather with metal on each end that appears to have staples/loops connecting the metal to the leather. Can anyone identify what I have? Thanks.