Pickett N610-ES Log Log Speed Rule, Hydraulic Variant, American Pipe & Construction Co., 5"

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Country of manufacture: USA,            Date of manufacture: ____
Overall length: 15.3 cm,          Width: 2.8 cm,           Weight: 34.8 gms
Materials: all aluminum, adjustable
Cursor: 1.5 X 3.9 X 0.8 cms; all plastic, slightly magnifying, adjustable; lines = single line, front and back
Scales: 16, some specialized
Front: LL₁ (1.01 to 1.105/-.99 to .905), A [ B, ST, T, S, C ] D, DI, K
Back: A' (Diameter for Velocity), B' (Diameter for Quantity) [ C' (Velocity Feet per Second/Quantity Cubic Feet per Second), D' (Manning's "n") ] E' (Hydraulic Gradient, Feet per 1000 Feet)
Gauge Marks: [ π, //, /, 785, R ]
Condition: C2 (Mint but without one or more of the extras)
Came with: Original brown leather pocket sheath, instruction booklets

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