Graphic Chemical Predictor

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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.

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