Sterling 587

Country of manufacture: USA,            Date of manufacture: ____
Overall length: 15.6 cm,          Width: 2.8 cm,           Weight: 16.0 gms
Materials: all plastic, simplex type, closed form,
Cursor: 2.2 X 3.0 X 0.4 cms; all plastic, slightly magnifying; lines = one, front only
Scales: 9
Front: A [ B, CI, C ] D, K
Back: blank
Slide Back: [ S, L, T ]
Gauge Marks: [ π, 785, C, //, / ]
Condition: C5 (signs of normal use)
Came with: nothing
Notes: I have no idea where I got this rule or why I got it.