Vintage Electronic Calculators:

Overview of Brands


CITIZEN: 121F (version-1)
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AKA (Label): MODEL 121-F, ELECTRONIC CALCULATOR, Product number (P/N): 121F,
Keywords/Tags: 121F
Date of intro: 1977, Origin: Japan (List),
Power: AC,
Display: Type = Display (VFD) (List), Digits = 12+1,
Number of keys: 24, #Key-Blue: 9, #Key-Grey: 11, #Key-Orange: 1, #Key-Red: 3,
Keyboard Array (Rows x Columns): 04x07,
Decimal switch: [F-4-3-2-0],
Classification: / Desktop with Display,
Featuring: Logic-technology: LSI (Large Scale Integration), calculator-chipset, Memories: 1,
Related with: CITIZEN_docu: (Ad.) *: Unsere Idee: Vorteilhafter Einkauf...,
Main Components: MITSUBISHI: MA8603B; MITSUBISHI: MA8604-03B; MITSUBISHI: MA8605B,
Other components: MITSUBISHI: M58212P; MITSUBISHI: M58602-81P,
Serie-members: CITIZEN: 121F (version-1) (1 Switch); CITIZEN: 121F (version-2) (3 Switches, 24 Keys); CITIZEN: 121F (version-3) (3 Switches, 25 Keys),
Initial Cost Price: DEM260, Collector value: 7/10,


Created: 22-mar-2016, Manual-update: 09-dec-2023, Batch-update: 25-feb-2024             

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