AKA (Label): ELECTRONIC CALCULATOR, MODEL 522SR, Product number (P/N): 522SR,
Keywords/Tags: 522SR
Date of intro: ~1975, Origin: Japan (List), Dimensions: 156x90x25mm, Weight: 155g,
Power: 6V: (AA x4) + Adaptor, Adaptor: BROTHER_adaptors: 4086A; BROTHER_adaptors: DC620E; BROTHER_adaptors: DC620RA,
Display: Type = Display (VFD) (List), Digits = 8+1+(2+1),
Number of keys: 40, #Key-Blue: 19, #Key-Orange: 4, #Key-White: 17,
Miscellaneous switch: [OFF-ON DEG-RAD],
Classification: / Pocket,
Featuring: Scientific functions, Square root, PI, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Main Components: NEC: µPD951C,
Known Serial-numbers: C6014553 (C 6014553) (List of all S/Ns from BROTHER)
Collector value: 7/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Internet: Link-1