Stone Axe or Tomahawk Is it antique or Native American?

I’m not sure if this is Native American or was just made in the 20th century? The custom box that came with it, has an address label that seems to be from the 40s or 50s. I am not sure why someone would make a case for it, if it was not something special? However, it seems very simple, and the leather seems like it is 20th Century. Does anyone have some input on the origin of this stone axe?

18 inch handle, wood, 1.5 inch diameter on bottom, stone is about 6x4 inches and case is about 20x 7x 4