Antique Wood Plane Salesman Sample or Toy

is a small antique wooden plane that I recently purchased from a lady in her 60's that indicated it was her Grandfathers. This is a functional small wood plane that was sold as either a toy or a salesman's sample. It of cast iron construction. I cannot find any identification as to the manufacture on the plane. The adjustment screw operates and is not frozen. The blade is sharp! The plane looked to have been originally dipped in a black paint. The plane measures 3 1/2 " in length, 1 1/4" wide at the middle, 1" at the tail and 1 1/8" at the front and 1 1/2" tall. Overall, a nice plane with no missing parts or damage.