Graphic Chemical Predictor
Country of manufacture: USA, Date of manufacture: >= 1958
Diameter: 20.8 cm, Weight: 35 gms
Materials: all plastic
Cursor: one, radial
Bottom Disk: Oxidation equations Oxidation Potential
Top Disk: Reduction equations, Reduction Potential
Back: Instructions for use.
Condition: C3 (Very minimal signs of use)
Came with: Paper sleeve
Note: Compare this version with the somewhat earlier one produced by Donald Hedberg, here.