CALCUSEUM HP_calcs: 21 (version-1)

HP_calcs: 21 (version-1)
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	Product number (P/N): 21, Keywords/Tags: 21 Date of intro: 1975, Origin: Singapore (List), Dimensions: 130x68x30mm, Power: Rechargeable, Display: Type = Display (LED) (List), Digits = 12, Number of keys: 30, #Key-Black: 13, #Key-Blue: 1, #Key-White: 16, Miscellaneous switch: [OFF-ON DEG-RAD], Classification: / Pocket / RPN (Reverse Polish Notation), Featuring: Scientific functions, Square root, PI, Related with: HP_parts: 82019A (Battery holder); HP_parts: 82019B (Battery pack Rechargeable); (Docu_Mags): 197601: ELECTRONICS TODAY INTERNATIONAL; (Docu_Catalogs): EATON: 197512 Christmas; HP_parts: (Box) 21, Known Serial-numbers: 1505A60202 \| 1506S10727 \| 1507S02177 \| 1507S21880 \| 1601S22729 \| 1709S36742 (List of all S/Ns from HP_calcs) Initial Cost Price: USD125.00, Collector value: 8/10, Courtesy of: CALCUSEUM (Serge DEVIDTS), Internet: Link-1: EARLY ELECTRONIC CALCULATOR TECHNOLOGY REFERENCE
Item

Product number (P/N): 21,
Keywords/Tags: 21
Date of intro: 1975, Origin: Singapore (List), Dimensions: 130x68x30mm,
Power: Rechargeable,
Display: Type = Display (LED) (List), Digits = 12,
Number of keys: 30, #Key-Black: 13, #Key-Blue: 1, #Key-White: 16,
Miscellaneous switch: [OFF-ON DEG-RAD],
Classification: / Pocket / RPN (Reverse Polish Notation),
Featuring: Scientific functions, Square root, PI,
Related with: HP_parts: 82019A (Battery holder); HP_parts: 82019B (Battery pack Rechargeable); (Docu_Mags): 197601: ELECTRONICS TODAY INTERNATIONAL; (Docu_Catalogs): EATON: 197512 Christmas; HP_parts: (Box) 21,
Known Serial-numbers: 1505A60202 | 1506S10727 | 1507S02177 | 1507S21880 | 1601S22729 | 1709S36742 (List of all S/Ns from HP_calcs)
Initial Cost Price: USD125.00, Collector value: 8/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Internet: Link-1: EARLY ELECTRONIC CALCULATOR TECHNOLOGY REFERENCE

Item


Advertisement POPULAR SCIENCE / TKENTERPRISES (jun-1977) Selling Price: USD64.00	Advertisement A real scientific calculator from Hewlett-Packard. NEW SCIENTIFIC Pag.63 (08-jan-1976) Selling Price: GBP64.00	Advertisement Da dove cominci HEWLETT-PACKARD	Advertisement Die prominenten-Familie DER SPIEGEL Pag.1/2 (1975)	Advertisement Free, if you buy HP-21 by April 30th. NEW SCIENTIFIC (08-apr-1976) Selling Price: GBP16.95	Advertisement Hewlett-Packards scientific calculators NEW SCIENTIST Pag.1/2 (07-aug-1975)	Advertisement Hewlett-Packards scientific calculators NEW SCIENTIST Pag.2/2 (07-aug-1975)	Advertisement Nach diesen 7 Gründen werden Sie den neuen HP-21 k FUNKSCHAU Pag.23 (1975)	Advertisement r.p.n. from Guilford NEW SCIENTIST / GUILFORD Calculator Centre (10-jul-1975) Selling Price: GBP69.12	Advertisement The Rockwell Slide Rule: Pay less. Get more ST. PETERSBURG TIMES Pag.1/2 (21-aug-1975)


Advertisement The Rockwell Slide Rule: Pay less. Get more ST. PETERSBURG TIMES Pag.2/2 (21-aug-1975)	Advertisement The uncompromising one HEWLETT-PACKARD (1975) Selling Price: USD125.00	Brochure Die Perfektion Pag.2/2 (1976)	Brochure Rechner für Rechner! HORTEN Pag.5+6/8	Brochure (fragment) De toekomst binnen uw bereik Pag.03/10 (aug-1977)	Magazine (fragment) WHICH? Pag.520+521 (sep-1977)	Drawing	Label, name plate / Bottom	Label, name plate / Connector S/N: 1505A60202	Serial number S/N: 1709S36742

Created: 01-sep-2002, Manual-update: 06-mar-2023, Batch-update: 10-sep-2025

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