AKA: MODEL V121-A, AKA (Label): V121-A, Product number (P/N): V121A ((SquareRoot) 121-A),
Keywords/Tags: V121A ((SquareRoot) 121-A)
Date of intro: 1972, Origin: Japan (List), Dimensions: 240x180x65mm, Weight: 1200g,
Power: AC,
Display: Type = Display (Nixie) (List), Digits = 12,
Keyboard: Reed-switch, Number of keys: 19, #Key-Black: 16, #Key-Blue: 1, #Key-Red: 2,
Classification: / Desktop with Display,
Featuring: Square root, Logic-technology: LSI (Large Scale Integration), calculator-chipset,
Related with: CASIO_docu: (Instr.) 121A; CASIO_docu: (Keyboard Overlay) 121A; CASIO_docu: (Broch.) 121A: Most excellent companion...; CASIO_docu: (Broch.) *: A brief introduction... (1972); CASIO_parts: (Box) 121A,
Main Components: NEC: µPD173D; NEC: µPD357D; NEC: D174B,
Other components: (Unknown manufacturer): 5304; NEC: µPD13C; NEC: µPD308C; NEC: D109A {2x}; TOSHIBA: T1191; TOSHIBA: T4097 {3x},
Original Equipment Manufacturer : CASIO: 121A (SquareRoot 121A) (List of all Export-OEM-models from CASIO), Resemblance with: REMINGTON: EDC1205; SIGMA DENSI: 1200M (SqareRoot 1200M), (Resemblance 521B),
Known Serial-numbers: 608853 | 706619 | 707459 | 708142 (List of all S/Ns from CASIO)
Initial Cost Price: 89500 JPY (€ 724,95), Collector value: 8/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Internet: Link-1: CURTAMANIA, Link-2