BRL Meterological Office Humidity Slide Rule, Mark IV, Met. Ref. No. 1468

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Country of manufacture: England,            Date of manufacture: ____
Overall length: 28.7 cm,          Width: 4.7 cm,           Weight: 161.2 gms.
Materials: closed body form, all plastic
Cursor: 3.5 X 5.0 X 0.6 cms; all plastic, slightly magnifying, reversible; lines = single hairline
Scales: Specialized
Gauge Marks: [       ]
Condition: C3-C4 (Very Minimal to Minimal signs of use)
Came with: Original dark green cardboard box/case

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