K&E 4181-3 Log Log Duplex Decitrig (also K&E 68-1251, 1256)

Country of manufacture: USA,            Date of manufacture: ____, Ser. No.: 479849
Overall length: 31.8 cm,          Width: 4.1 cm,           Weight: 96.3 gms
Materials: all plastic, metal end braces, adjustable
Cursor: 3.0 X 5.0 X 1.0 cms; plastic runners, metal framed glass lens, adjustable; lines = single hairline, front and back
Scales: 21, no extensions
Front: LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2
Back: LL01, L, K, A [B, T, SRT, S] D, DI, LL1
Gauge Marks: [π, e, 1/e, 785 ]
Condition: C4 (minimal signs of use)
Came with: Original green leather case