Precision Scale Inc Spring Design Slide Rule for Spring Engineer's Inc.

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Country of manufacture: USA,            Date of manufacture: ____
Overall length: 31.8 cm,          Width: 3.8 cm,           Weight: 96.6 gms
Materials: all aluminum, adjustable
Cursor: 3.1 X 5.2 X 0.7 cms; all plastic, adjustable, slightly magnifying; lines = single, front and back
Scales: 12, specialized
Front: d [ D, S, D/d ] P or M
Back: d [ D, D_t, "E", N, "G" ] R_f or R_t
Condition: C2 (Mint but w/o all extras)
Came with: nothing

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