Dietzgen 1739-L Clear Scale

Country of manufacture: Germany,          Date of manufacture: ____
Overall length: 32.4 cm,          Width: 4.2 cm,           Weight: 68.6 gms.
Materials: All plastic, glued-on plastic end braces
Cursor: 4.5 X 5.1 X 0.8 cms; all plastic, adjustable; lines = Four on front, two on back
Scales: 20, extended CIF scale
Front: L, K, A [B, CI, C] D, LL1, LL2, LL3
Back: T1, T2, DF [CF, CIF, CI C] D, S, ST
Gauge Marks: [π, e, ρ'', C, C1. M, A ]
Condition: C4 (minimal signs of use)
Came with: Original plastic box, instruction manual