AKA: elka 135m, Product number (P/N): 135M,
Keywords/Tags: 135M
Date of intro: ~1977, Origin: Bulgaria (List), Dimensions: 135x70x28mm, Weight: 120g,
Power: 6V: (AA x4) + Adaptor,
Display: Type = Display (LED) (List), Digits = 8+1,
Number of keys: 20, #Key-Black: 11, #Key-Orange: 2, #Key-White: 7,
Miscellaneous switch: [ON-OFF DEG-RAD],
Classification: / Pocket,
Featuring: Scientific functions, Square root, PI,
Collector value: 8/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Internet: Link-1: THIMET, Link-2: A-MUSEUM