Vintage Electronic Calculators:

Overview of Brands


CASIO: 121E (version-2)
(Page 1/1)

AKA: MODEL V121-E, AKA (Label): V121-E, Product number (P/N): V121E (V121-E),
Keywords/Tags: V121E (V121-E)
Date of intro: 1973, Dimensions: 203x178x51mm,
Display: Type = Display (VFD tube) (List), Digits = 12,
Keyboard: Reed-switch, Number of keys: 21, #Key-Black: 5, #Key-Blue: 3, #Key-Orange: 2, #Key-White: 11,
Decimal switch: [6-4-3-2-1-0], Round switch: [F-5/4-CUT],
Classification: / Desktop with Display,
Featuring: Procent, Square root, Logic-technology: LSI (Large Scale Integration), calculator-chipset, Memories: 1,
Main Components: HITACHI: HD3219P; HITACHI: HN3259P; HITACHI: HD32103P,
Other components: HITACHI: HD3113P; HITACHI: HD3213P {2x}; HITACHI: HD3226P; HITACHI: HD3227P; HITACHI: HD3251P; TOSHIBA: T1191; TOSHIBA: TM4352P {4x},
Resemblance with: (Resemblance 521B),
Serie-members: CASIO: 121E (version-1) (Without Square Root); CASIO: 121E (version-2) (With Square Root),
Known Serial-numbers: B610531 | B705642 (List of all S/Ns from CASIO)
Collector value: 8/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),




Internals (display)
Strange zeros

Internals (power supply)

Internals (PCB) / Internals (keyboard) / Internals

Label, name plate / Bottom
S/N: B705642

Created: 25-apr-2016, Manual-update: 19-jul-2021, Batch-update: 25-feb-2024             

# Pageloads since 2018: 172             

7 Pic(s),


If you have a (better) personal picture and/or missing info about any model not listed: Please do send a Mail