AKA: Ei minitron 831, AKA (Label): Model: minitron 831B, Product number (P/N): 831B,
Keywords/Tags: 831B | Ei | minitron
Date of intro: ~1975, Dimensions: 120x70x24mm,
Display: Type = Display (LED) (List),
Number of keys: 20, #Key-Black: 9, #Key-Brown: 11,
Classification: / Pocket,
Featuring: Procent, Square root,
Related with: FABRIKA RACUNSKIH MASINA_docu: (Cat.) 1978,
Resemblance with: (Resemblance 054),
Serie-members: FABRIKA RACUNSKIH MASINA: 831 (LED-version); FABRIKA RACUNSKIH MASINA: 831B (VFD-version),
Known Serial-numbers: 310198 (List of all S/Ns from FABRIKA RACUNSKIH MASINA)
Collector value: 7.5/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),