Perrygraf Pratt & Whitney Gas Turbine Cimputer

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Country of manufacture: USA,            Date of manufacture: >= 1957
Diameter: 16.5 cm
Materals: Cardboard
Cursor: Plastic, 2-sided; lines = one on each side
Outer Disk (Front): Instructions, P    Inner Disk (Front): N, A, M, P_r/P_am, T_r/T_am, T Air Temp (°F and °C), Instructions
Outer Disk (Back): EGT Corr (°R, °:F, and °C), Corr    Inner Disk (Back): Ind, T (°F and °C), P - In Hg, T' (°F and °C), Instructions
Gauge Marks: [     ]
Condition: C5 (Signs of Normal Use)
Came with: Clear/white plastic slipcase lettered, "Gas Turbine Computer, Pratt & Whitney Aircraft"

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