Skala SLE Elektro

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Country of manufacture: Poland,            Date of manufacture: ____, Serial No. 23836
Overall length: 33.5 cm,          Width: 6.1 cm,           Weight: 132.4 gms
Materials: all plastic, plastic end braces glued onto back side of rule
Cursor: 4.0 X 6.6 X 0.5 cms; all plastic; lines = three, front side only
Scales: 16, extensions on X², X, 1/X
Front: η%, Δu, log, √(1-X²), X³, X² [ X², 1/X, M, X ] X, e^x, e^0.1x, sin, tg, s-t
Back: Blank
Gauge Marks: [ π, 1/π, {unknown: Cu_k (1819), Cu_n (1885), Al_n (270), Al_n (303), Cu (890) }, e, C, ρ, ρ'', ρ', C1, ρ^o ]
Condition: C2-C3 (Mint to very minimal signs of use
Came with: Original black plastic sheath
Note: The 'M' scaled on this rule is a little unusual. For more information, see this article.

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