Vintage Electronic Calculators:

Overview of Brands


MBO: Secretary
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AKA (Label): Elektronenrechner, Modell: Secretary, Bestell-Nr.: 0520, Product number (P/N): 0520,
Keywords/Tags: 0520 | Secretary
Date of intro: 1976, Dimensions: 175x105x45mm,
Power: 4.5V: (AA x3),
Display: Type = Display (VFD) (List),
Number of keys: 25, #Key-Blue: 14, #Key-White: 11,
Decimal switch: [2-0-F-ADD], Round switch: [(ArrowUp)-5/4-(ArrowDown)], Miscellaneous switch: [OFF-ON (Blank)-(Sigma)],
Classification: / Pocket,
Featuring: Procent, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Resemblance with: (Resemblance 012D),
Known Serial-numbers: 19400551 | 19401837 (List of all S/Ns from MBO)
Collector value: 8/10,


Label, name plate
S/N: 19400551

Created: 08-aug-2014, Manual-update: 15-sep-2019, Batch-update: 06-aug-2022             

# Pageloads since 2018: 7             

2 Pic(s),


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