Abbot Brown Isotope Handling Calculator No. 1, A.E.R.E., Harwell

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Country of manufacture: England,            Date of manufacture: ____
Diameter: 21.6 cm,          Thickness: 0.8 cm,           Weight: 196.2 gms
Materials: All plastic;           Cursor: all plastic, one hairline on front; Isotope indicators on cursor
Scales: 10
Front: Outer disk: Safe Handling Time, Source Distance, Inner disk: Source Strength, Lead Thickness Used/Required for each of: Na²⁴, Co⁶⁰, Radium, Ta¹⁸², Ir¹⁹² , Au¹⁹⁸, I¹³¹
Back: Instructions for Use
Gauge Marks: [       ]
Condition: C3 (Signs of Very Minimal Use)
Came with: nothing

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