IWA RS 221 Slide Rule for Weight Determinations

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Country of manufacture: Germany,            Date of manufacture: ___
Overall length: 38.1 cm,          Width: 4.9 cm,          Weight: 138.7 gms
Materials: all plastic
Cursor: 5.0 X 5.5 X 0.8 cms; all plastic; lines: one, front side only
Scales: 6, specialized
Front: specific gravity kg.dm³ [ wall thickness mm, width - outer diameter minus wall thickness mm ] [ diameter wrench size mm, length mm ] weight kg
Back: Examples of Weight Determination, Steel Pipes, Round Rods made of Hartgewebe (fiber-filled phenolic resin) , Dural (aluminum alloy) Sheet
Condition: C3 (Very Minimal Signs of Use; no manual)
Came with: Original brown cardboard case

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