Perrygraf Probability Slide Rule, for Measurement Analysis Corporation

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Country of manufacture: USA,            Date of manufacture: ____
Diameter: 16.5 cm,          Thickness: 0.3 cm,           Weight: 41.9 gms
Materials: All plastic, 2 sided, single cursor
Scales: 6
Front: Probability Slide Rule: Outer Disk: x, Normal Probability dist., Rayleigh Probability dist., Maxwell Probability dist.
Back: Multiple Event Probability: Outer Disk: N, Inner Disk: P₁/P₀
Gauge Marks: [      ]
Condition: C3 (Very Minimal Signs of Use)
Came with: Cardboard sleeve, instruction sheet

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