K&E 4139 979921 Cooke Radio Rule

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Country of manufacture: USA,            Date of manufacture: ____, Ser. No. : 979921
Overall length: 30.9 cm,          Width: 3.4 cm,           Weight: 79.9 gms
Materials: Celluloid laminate over mahogany, metal end braces, adjustable
Cursor: 2.6 X 4.2 X 1.1 cms; plastic runners, metal framed glass lens, adjustable; lines = single hairline, front and back
Scales: 16, no extensions
Front: L, DF [CF, CIF, CI, C] D, 2π
Back: LC, A [B, T, ST, S] D, DI
Gauge Marks: [π, R, //, /, 785 ]
Condition: C5; cursor pads replaced because of serious KERCS issues.
Came with: Original orange leather case, flap broken

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