SIDA Vibration Measurement Slide Rule

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Country of manufacture: China,            Date of manufacture: ____
Overall length: 33.8 cm,          Width: 4.8 cm,           Weight: 101.8 gms
Materials: All plastic, plastic end braces glued on.
Cursor: 3.8 X 5.9 X 1.1 cms; plastic runners holding plastic lens, adjustable; lines = three on front, one on back.
Scales: 19, no extensions, some specialized.
Front: Sh1, Sh2, K, A [ B, T, ST, S, C ] D, DI, L, Th
Back: (non-standard scale designations) g, a [ SL, S ] U, d
Gauge Marks: [π ]
Condition: C3-C4 (Very minimal to minimal signs of use)
Came with: Orig. blue plastic case

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