Precision Scale Inc. Air Force Aerial Photo Rule Type A-1

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Country of manufacture: USA,            Date of manufacture: ____
Overall length: 31.9 cm,          Width: 3.8 cm,           Weight: 97.4 gms
Materials: all aluminum, adjustable
Cursor: 2.1 X 5.1 X 0.7 cms; all plastic, adjustable; lines = single line front and back
Scales: 16, including some specialized on back
Front: L, A, DF [ CF, CIF, T, S, C ] D, DI, K
Back: Ground size, Ground Speed [ Image Size (cm), Image Size (feet), Focal Length ] Altitude
Gauge Marks: [ π, R ]
Condition: C2 (Mint but no manual)
Came with: Original black leather and plastic case

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Equivalents Table glued onto leather case

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