Aristo 10072 Hazen-Williams Hydraulic Slide Rule

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Country of manufacture: Germany,            Date of manufacture: ____
Overall length: 32.0 cm,          Width: 4.4 cm,           Weight: 81.1 gms.
Materials: All plastic; glued on plastic end braces
Cursor: 3.3 X 4.8 X 0.5 cms; all plastic; lines = Single hairline on front
Scales: 9
Front: 10 in, 1 (2-decade log scale) [ 2 (2-decade log scale), 3a (hydraulic radius), 3b (diameter in inches) ] 4 (slope in feet per 1000)
Slide Back: 5 (2-decade log scale), 6a, 6b
Gauge Marks: [ π ]
Condition: C2 (Mint but all extras not present)
Came with: Original red/white plastic case

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