Unique Slide Rule for Tube Making and Deep Drawing, Tube Investments Ltd.

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Country of manufacture: England,            Date of manufacture: >= 1952
Overall length: 30.0 cm,          Width: 4.7 cm,           Weight: 101.3 gms
Materials: printed paper scales laminated onto boxwood body and slide
Cursor: 3.4 X 5.6 X 0.6 cms; all plastic; lines = slingle line, front only
Scales: 9, most are specialized
Front: mm, R1 [ R2, TH (44g-21g, 21g-1g, 39.2-318), C ] D, Wt. (Mild Steel)
Back: Aid to Decimal Pointing, Weight Conversion Factors, Mild Steel Comparisons. Metric Conversion Factors
Gauge Marks: [ π ]
Condition: C3 (Very minimal signs of use)
Came with: Nothing

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