Visi-meter (Sight Glass) with plastic cylinder

Cast top and bottom with clear plastic cylinder, housing a spinner.  The castings and rods are held together with acorn nuts.  Inlet and outlet holes are 1" N.P.T.  Approximately 5" diameter x 8" high.  Top sign is additional 2 1/2" for overall 10 1/2" height.   Intended for decorative purposes only.