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APF: 21
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AKA: MARK 21, Electronic Memory Calculator, AKA (Label): mark 21, HANDHELD MEMORY CALCULATOR, 215901, Product number (P/N): 21,
Keywords/Tags: 21 | MARK 21 | Electronic Memory Calculator
Date of intro: 1975, Origin: Japan (List), Dimensions: 161x74x28mm,
Adaptor: APF_adaptors: 751S,
Display: Type = Display (VFD) (List), Digits = 8,
Number of keys: 24, #Key-Black: 19, #Key-White: 5,
Keyboard Array (Rows x Columns): 05x05,
Miscellaneous switch: [OFF-ON],
Classification: / Pocket,
Featuring: Procent, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip, Memories: 1,
Main Components: MOS TECHNOLOGY: MPS7545,
Known Serial-numbers: A0021901044 (A-002190, 1044) | MT0198157545 (MT-019815, 7545) | MT027530 (MT-027530) | MT0352717545 (MT-035271, 7545) | MT0612837545 (MT-061283, 7545) | R006187 (R-006187) | R018030215901 (R-018030, 215901) (List of all S/Ns from APF)
Collector value: 7/10,
Internet: Link-1: SMITHSONIAN MUSIC

Item

Accessories

Catalogue
JCPENNEY Christmas 1976
JCPENNEY
Pag.277
(1976)
X6415541A

Created: 25-may-2003, Manual-update: 31-aug-2022, Batch-update: 25-nov-2022             

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