Logarex 27402-X Elektro

Country of manufacture: Czechoslovakia,            Date of manufacture: ____
Overall length: 30.2 cm,          Width: 4.2 cm,           Weight: 84.5 gms
Materials: all plastic, plastic end braces glued onto back elevate off work surface
Cursor: 4.8 X 4.7 X 0.7 cms; all plastic, slightly magnifying; lines = four lines on front
Scales: 13, extensions on A, B, C, D
Front: L, K, A [B, CI, C] D, LL1, LL2, LL3
Back: physical constants and conversion factors [S, ST, T] physical constants and conversion factors
Gauge Marks: [π, 2π, e, C, C1, ρ'', ρ', ρo, 736, 136, 253, dB (868), NP (115), NP 5 (unknown but prob. related to dB/NP conversion), dB 436 (unknonw but prob. related to db/NP conversion), Cu1, Al1, N (7136), M (738), K (798) ]
Condition: C4-C5 (Minimal to normal signs of use)
Came with: nothing