Vintage Electronic Calculators:

Overview of Brands


APF: 73
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AKA: MARK 73, AKA (Label): MARK 73, B-5000M, Product number (P/N): B5000M (B-5000M),
Keywords/Tags: B5000M (B-5000M) | 73 | MARK 73
Date of intro: ~1974, Origin: Hong Kong (List), Dimensions: 130x74x26mm, Weight: 75g,
Power: 9V + Adaptor, Adaptor: APF_adaptors: 751S,
Display: Type = Display (LED) (List), Digits = 8,
Number of keys: 20, #Key-Blue: 2, #Key-Grey: 11, #Key-White: 7,
Keyboard Array (Rows x Columns): 04x05,
Classification: / Pocket,
Featuring: Procent, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip, Memories: 1,
Known Serial-numbers: H73008231 (H73-008231) | H73025531 (H73-025531) | H73033829 (H73-033829) (List of all S/Ns from APF)
Collector value: 7.5/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),


Created: 10-apr-2014, Manual-update: 01-sep-2020, Batch-update: 23-mar-2023             

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