Vintage Electronic Calculators:

Overview of Brands


MBO: Junior (version-3)
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Product number (P/N): Junior,
Keywords/Tags: Junior
Date of intro: 1973, Origin: Germany (List), Dimensions: 130x76x30mm, Weight: 145g,
Power: 7.5V: (AA x5) + Adaptor,
Display: Type = Display (LED) (List), Digits = 8+1,
Number of keys: 19, #Key-Red: 8, #Key-White: 11,
Decimal switch: [1-2-3-4-5-6-7-8-9], Miscellaneous switch: [OFF-ON],
Classification: / Pocket,
Featuring: Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Main Components: TEXAS INSTRUMENTS: TMS0105NC,
Other components: TEXAS INSTRUMENTS: SN75491N {2x}; TEXAS INSTRUMENTS: SN75492N {2x},
Resemblance with: (Resemblance 050), Made by: DITTEL (List of all Import-OEM-models for MBO),
Known Serial-numbers: 7945 (List of all S/Ns from MBO)
Collector value: 8/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),



Created: 04-apr-2016, Manual-update: 07-jan-2020, Batch-update: 25-feb-2024             

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