Vintage Electronic Calculators:

Overview of Brands


APF: 22
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AKA: MARK 22, Electronic Scientific Calculator, AKA (Label): mark 22, HANDHELD SCIENTIFIC CALCULATOR, MARK 22, Product number (P/N): 22,
Keywords/Tags: 22 | MARK 22 | Electronic Scientific Calculator
Date of intro: ~1976, Origin: Japan (List),
Adaptor: APF_adaptors: 751S,
Display: Type = Display (VFD) (List), Digits = 8+1,
Number of keys: 19, #Key-Black: 11, #Key-Red: 1, #Key-White: 7,
Keyboard Array (Rows x Columns): 04x05,
Miscellaneous switch: [ON-OFF DEG-RAD],
Classification: / Pocket,
Featuring: Scientific functions, Square root, PI, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Related with: (Docu_Articles): 197703: Electronic calculators get better and better,
Resemblance with: SEARS: 41026,
Serie-members: APF: 22,
Known Serial-numbers: J024315 (J-024315) | J030595 (J-030595) | J102090 (J-102090) | J107483 (J-107483) (List of all S/Ns from APF)
Collector value: 7/10,




Label, name plate / Examples of use / Bottom
S/N: J102090 (J-102090)

Created: 23-sep-2000, Manual-update: 23-sep-2023, Batch-update: 25-feb-2024             

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4 Pic(s),


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