K&E 4092-3 Log Log Duplex

Country of manufacture: USA,            Date of manufacture: ____, Ser. No.: 479522
Overall length: 31.9 cm,          Width: 4.0 cm,           Weight: 107.7 gms
Materials: Celluloid laminate over mahogany, metal end braces, adjustable
Cursor: 3.0 X 5.0 X 1.1 cms; plastic runners, metal framed glass lens, adjustable; lines = single hairline, front and back
Scales: 17, no extensions
Front: K, DF [CF, CIF, CI, C] D, L
Back: LL0, A [B, S, T, C] LL3, LL2, LL1
Gauge Marks: [π, e, e-1, //, /, 785 ]
Condition: C5 (signs of normal use)
Came with: Original brown leather case