The table below lists the additions and significant changes that have been made to the Calculators section of this Web Museum. The date of the most recent update is always shown at the bottom of each page.
| Date | Section | Details |
|---|---|---|
| 2022-09-04 | Technical | Revised and expanded the Notes on overhauling a mechanical calculator, especially the Cleaning and Lubrication sections. |
| 2022-06-10 | Technical | Major revision of Facit TK/NTK/C1-13 rebuilding procedure.
Added Facit TK/NTK/C1-13 mechanical changes page |
| 2022-03-08 | Contex | Added two Contex carrying cases. |
| 2022-03-06 | Technical | Added new Rebuilding procedure for the Model J Comptometer, revised the 3D11 rebuilding procedure. |
| 2022-03-06 | Technical | Revised the Technical Description of the Model J Comptometer, added many new illustrations. |
| 2022-03-06 | Bell Punch Company | Major revision. Added new pictures, added more PLUS and Sumlock machines, now includes Sumlock machines with Comptometer nameplates. |
| 2022-03-06 | Felt & Tarrant (Comptometer) | Moved Sumlock machines with Comptometer nameplates to Bell Punch Company page; added 8-column Sterling Model J. |
| 2021-12-19 | Pinwheel | Added Thales Model B, c.1920. |
| 2021-12-19 | Addo and Multo | Added late-model Multo 3. |
| 2021-12-01 | Marchant | Revised text, added Dactyle, Standard, XL (two versions), and XLA. |
| 2021-07-06 | Printing calculators | Added two S.A.B.A. AddMaster machines. |
| 2021-06-19 | Slide Adders ("Addiators") | Major revision, added many more machines. |
| 2021-05-30 | Burroughs | Revised text, added 10-column Class 3 bookkeeping machine, 1919. |
| 2021-05-26 | Sanyo | Revised text, added CY-8150, CY-2131, CY-2132, CY-5012, CZ-8100. |
| 2020-11-10 | Addo and Multo | Added new page with ten Addo and Multo calculators, revised entries on Printing and Pinwheel pages. |
| 2020-09-15 | Technical | Updated the Odhner 239 rebuilding procedure with many small improvements and clarifications. |
| 2020-05-07 | Friden | Added Singer/Friden/Hitachi 1115 electronic calculator, 1970. |
| 2019-12-01 | Friden | Added US Army hand-crankable STW. |
| 2019-09-10 | Casio | Added Casio Memory A-1, 1976. |
| 2019-09-08 | Sharp | Added Sharp EL-8118, 1976. |
| 2019-01-24 | Technical | Added reproduction
Instruction Manual for the Fuller Calculator
(cylindrical slide rule).
Added reproduction Friden Effort Savers promotional booklet. |
| 2018-12-18 | Casio | Added Casio "Mini" CM-604, 1974. |
| 2018-11-19 | Sharp | Added Sharp PC-1802 "Digital Rule" (portable scientific calculator), 1974. |
| 2018-10-09 | Pinwheel | Revised text, added Tiger H68-21 pinwheel, 1968. |
| 2018-07-31 | Technical | Added reproduction Instruction Manual for Friden "Super-Matic Tabulator" Model ST. |
| 2018-07-26 | Small adding machines | Added SOLO Handy Adder in red. |
| 2018-05-10 | Technical | Revised the Technical description of the Adwel W504 printing calculator. |
| 2017-09-19 | Technical | Revised the Technical description of the Odhner pinwheel mechanism and the Rebuilding procedure for the Odhner 239; added a new Rebuilding procedure for the Odhner 127. |
| 2017-07-17 | Brunsviga | Various minor revisions, added 94T carry bag. |
| 2017-07-07 | Olivetti | Added Underwood Model 400 (re-styled Elettrosumma 22). |
| 2017-07-04 | Small adding machines | Revised text, added Thales Model KA small adding machine. |
| 2017-06-13 | Bell Punch Company | Revised text, added 9-column Sumlock "Duolectric". |
| 2015-07-06 | H.W.Egli | Revised text, added Madas Model 16eN. |
| 2015-07-01 | Facit | Revised text, added Facit Model C1-19, manual, with carriage, 10x10x19, 1956. |
| 2014-05-28 | Small adding machines | Revised text, added Summira Model 8£ disc adder. |
| 2014-01-15 | Miniature | Added to Curta section. |
| 2014-01-13 | Precisa | Added new page for Precisa AG, Zurich, Switzerland (also known as Hermes and Hermes-Precisa). |
| 2014-01-10 | H.W.Egli | Updated Register of Millionaire calculators, added statistics page. |
| 2013-12-03 | All | Site relocated to www.johnwolff.id.au due to closure of Vicnet hosting services. Sorry for the inconvenience. |
| 2013-11-23 | Full-function Ten-key | Added Hermes-Precisa Model 167-12. |
| 2013-11-12 | Pinwheel | Added Dactyle/Chateau S/N 6487. |
| 2013-10-29 | Bell Punch Company | Added PLUS Rapid Adder for Imperial weights. |
| 2013-10-22 | H.W.Egli | Added details of 50 more still-extant machines to the Register of Millionaire calculators. |
| 2013-06-10 | Small adding machines | Revised text, added Summira Model S8£ disc adding/printing machine, 1960s. |
| 2013-02-27 | Olympia | Added Olympia CD-71 8-digit portable calculator (single chip, NiCad batteries, 1974). |
| 2013-02-10 | Technical | Added new page on Removing and refitting the Triplex carriage to the Technical description of the MADAS Portable. |
| 2013-02-04 | Sharp | Added
Sharp PC-1002 desktop scientific calculator, 1974.
Added internal description of PC-1001 and PC-1002. |
| 2013-01-21 | Casio | Added Casio FX-20 scientific, FX-39 scientific, and SL-110 solar calculators. |
| 2013-01-21 | Electronic-Portable | Added Adler 108T scientific calculator. |
| 2013-01-15 | Sanyo | Added new page with 12 early electronic calculators from the Sanyo Electric Company. |
| 2013-01-15 | Technical | Updated internal descriptions of Sanyo ICC-1122 and ICC-1123 (1971-73). |
| 2013-01-02 | Olympia | Added Olympia CD-200 10-digit desk calculator (5-chip, Solitron, 1971) and internal description. |
| 2013-01-01 | Sharp | Revised text, added
Sharp EL-8 and
EL-811 8-digit battery portables, 1971 and 1972.
Revised internal description of EL-8 and 8M. Added internal description of EL-811, EL-816, and EL-8102. |
| 2012-12-22 | Brunsviga | Added Brunsviga 13RM pinwheel calculator, 1960s. |
| 2012-05-27 | Technical | Revised Odhner 239 rebuilding instructions. |
| 2012-05-16 | Felt & Tarrant (Comptometer) | Added several Related Items - Comptometer oil cans, operators' pin and ring, and Comptometer playing cards. |
| 2012-05-12 | Olivetti | Added Olivetti Divisumma 18 portable electronic printing calculator, MOS-LSI, 1973, and internal description. |
| 2012-04-16 | Olivetti | Added Olivetti Logos 58 electronic printing calculator, MOS-LSI, 1973, and internal description. |
| 2012-04-08 | Small adding machines | Revised text, added Adix single-column adder, 1903. |
| 2012-03-08 | Monroe | Revised text, added Monroe LA7-200, 1950s. |
| 2012-02-08 | Olympia | Added Olympia CD-400, DTL-SSI (139 chips), 1970, and internal description. |
| 2012-01-27 | Monroe | Revised text, added Monroe LA9-203, 1960. |
| 2011-12-22 | Technical | Added several more reproduction calculator manuals, some in colour. |
| 2011-11-30 | Sharp
Facit |
Revised text, added
Sharp CS-363 16-digit desk calculator (6-chip, Rockwell, 1971).
Revised page for related Sharp-built Facit 1135J. |
| 2011-11-09 | Canon | Revised text, added Canon L1630 16-digit desk calculator (5-chip, Hitachi, 1973). |
| 2011-10-20 | Technical | Added several more reproduction calculator manuals to the Manuals page. |
| 2011-07-13 | Casio | Added Casio's first "scientific" caclulator, the FX-10 (1974). |
| 2011-05-15 | Various | Added seven 1970s electronic calculators: Sharp EL-814 pocket calculator (LED, 1973), Adler EC-60 portable (1973), Litronix 1100 portable (LED, 1974), Casio Memory-8R pocket calculator (1975), Qualitron 1450 pocket scientific (1976), Imperial (Litton) IC-900 desktop (1973), and Monroe (Litton) 273M desktop printing calculator (1979). |
| 2011-03-20 | Comptometer Operator | Added new page for the Australian Comptometer Competition of 1925. |
| 2011-02-23 | Felt & Tarrant (Comptometer) | Revised text, added 4 photos, added Comptometer Model A (1905) and Comptometer Model E (1914). |
| 2011-01-30 | Victor | Added Tallymaster Model 37-57-0 manual add-list machine (1960s), and Tallymate Model 85 portable electronic calculator (1972). |
| 2010-11-29 | Technical | Updated Olivetti Logos 240 technical description, added details of MOS-LSI main board (1973). |
| 2010-11-27 | Monroe | Updated text, added LN-160X portable (1950s) and reproduction CSA-8/10 manual. |
| 2010-09-17 | Technical | Added several more reproduction calculator manuals. |
| 2010-06-07 | Casio | Revised text, added Casio Mini (1972) and Casio Memory 8F (c.1975) |
| 2010-06-04 | Friden | Added Singer/Friden 1200 electronic portable calculator, 1973 |
| 2010-05-07 | Printing Calculators | Added Precisa 208-10, 1968. |
| 2010-05-07 | Casio | Added Sperry-Remington 1125-M (variant of Casio Pocket Mini), 1975. |
| 2010-04-11 | Casio | Added Casio 101 electronic desk calculator, discrete-component DTL, 1966. |
| 2010-04-07 | Technical | Revised and expanded the rebuilding procedure for the Felt & Tarrant Comptometer. The new notes can be used with any of the manual rock-frame models from 1919 onwards. |
| 2010-02-28 | Technical | Added technical description of Anita 1011-LSI (c.1970). |
| 2010-02-28 | Bell Punch Company | Revised text, added Anita 1000 and 1011-LSI (c.1970). |
| 2010-02-04 | Burroughs | Revised text, added 7 more Burroughs Portables (1920s-1960s) and one J-1000 series (1960s). |
| 2009-12-30 | Casio | Revised text, updated ilustrations, added Casio Mini models
CM-603,
CM-605, and
Root-M (1973-74).
Added FX-101 scientific calculator (1976). |
| 2009-12-20 | Sharp | Revised text, added EL-122 6/12-digit portable and CS-523 desktop printing calculators (1974). |
| 2009-11-16 | Olympia | Added Olympia CP-1210 electronic printing calculator (1976). |
| 2009-10-28 | Technical | Added new page with details of reproduction calculator manuals. |
| 2009-10-22 | Electronic | Added 6 mid-1970s machines to the Portable electronic calculators page. |
| 2009-09-25 | Technical | Updated Facit C1-13 rebuilding procedure with notes on reassembling the rotor linear bearing. |
| 2009-09-19 | Victor | Added new page for theVictor Adding Machine Company, with 11 mechanical and 2 electronic machines. |
| 2009-09-15 | Key-driven calculators | Added Dacometer Model 508 half-keyboard adder for Sterling currency. |
| 2009-09-09 | Original-Odhner | Revised text, added Original-Odhner Model 23. |
| 2009-08-26 | Printing Calculators | Added Remington Monarch Model 93. |
| 2009-08-15 | Printing Calculators | Revised and reorganised Printing Calculators section with 12 new machines from Barrett, Sundstrand, and others. |
| 2009-08-02 | Calculating Machines | Reorganised Calculating Machines main page. |
| 2009-07-25 | Electronic | Reorganised
electronic calculator section.
Revised and updated Canon page. Added new pages for Compucorp and Casio calculators. |
| 2009-07-11 | Facit | Added Facit Model 1124, electronic, DTL-SSI (151 chips), 1968. |
| 2009-07-05 | Technical | Revised and restructured
Original-Odhner pinwheel mechanism description.
Added new page on Rebuilding the Original-Odhner Model 239 pinwheel calculator. |
| 2009-06-17 | Olivetti | Revised text, added Logos 240 (electronic, 1970). |
| 2009-06-17 | Technical | Added Olivetti Logos 240 technical description. |
| 2009-04-27 | Pinwheel | Added Muldivo Mentor (a re-badged Walther WSR-160). |
| 2009-04-14 | Bell Punch Company | Updated text, added more patent and nameplate details. |
| 2009-04-01 | Technical | Added step-by-step rebuilding procedure for the PLUS Rapid Adder. |
| 2009-03-29 | Key-driven | Re-structured Key-driven calculators (previously Comptometers) section, numerous minor updates and changes. |
| 2009-03-27 | Pinwheel | Added Triumphator 9x8x13, s/n 8252. |
| 2009-03-15 | Contex | Updated text and photos, added 2 more variants of Contex Model A. |
| 2009-03-05 | Technical | Revised Madas ATG Description of Operation. |
| 2009-01-24 | Technical | Added mechanism description and step-by-step rebuilding procedure for Addo Multo Model 113 pinwheel calculator. |
| 2008-12-29 | Olivetti | Revised text, added Divisumma 422 (electronic). |
| 2008-12-23 | Brunsviga | Added Brunsviga Model B (early version). |
| 2008-12-23 | Pinwheel | Added Thales Model A. |
| 2008-11-24 | Miniature | Added new page for Miniature full-function calculators - Curta, Multifix, and Alpina. |
| 2008-10-30 | Lagomarsino | Added new page for Lagomarsino - Numeria and Totalia calculators. |
| 2008-10-15 | Brunsviga | Revised text, added Brunsviga MIII. |
| 2008-10-10 | Friden | Revised text, added photo of Carl Friden. |
| 2008-09-29 | Technical | Added mechanism description for
Facit Model C1-13 pinwheel calculator (hand-cranked). Added mechanism description for Facit Model CA2-16 pinwheel calculator (fully-automatic). Added step-by-step procedure for Rebuilding the Facit Model C1-13. |
| 2008-09-26 | Technical | Added new page of Notes on overhauling a mechanical calculator. |
| 2008-05-26 | Sharp | Updated entries for PC-1001 and CS743R |
| 2008-04-15 | Walther | Added new page for Walther calculators |
| 2008-03-25 | Hans W Egli | Revised text, added MADAS 20BTG (two versions), added two 1940s advertising fliers. |
| 2008-03-10 | Comptometers | Expanded Comptometer Operators section with 3 new pages. |
| 2008-03-04 | Comptometers | Added Addicalco Model 53 |
| 2008-03-02 | Small adding machines | Added two BriCal 6-dial adders (Sterling and decimal versions) |
| 2008-02-26 | Olympia | Added new page for Olympia calculators |
| 2007-12-14 | Full-function Ten-key | Added Walther Diwa 32 |
| 2007-11-25 | Facit | Added Facit CM2-16S |
| 2007-11-21 | Hans W Egli | Revised text, updated Millionaire register. |
| 2007-11-04 | Comptometers | Added a new contributed article from a former comptometer operator. |
| 2007-10-25 | Home | Added Enquiry and feedback form. |
| 2007-10-25 | Marchant | Added notes on designer Joseph Sinel and DC distribution. |
| 2007-10-25 | Facit | Added Facit 1111 (OEM version of Sharp EL-8) |
| 2007-10-24 | Electronic - desktop | Added Compucorp "Alpha 325 Scientist" |
| 2007-09-25 | Full-function Ten-key | Added new category page for full-function ten-key calculators |
| 2007-09-10 | Contex | Revised text, new photos of four ten-key machines |
| 2007-09-07 | Facit | New photos of CA2-16 and 10-07 |
| 2007-08-29 | Slide Rules | Revised text, added Fearns-Mear Pipe Flow Calculator |
| 2007-08-28 | Small Adders | Added Add-O-Matic Pencil Case |
| 2007-08-27 | Facit | Revised CM2-16 and CM2-13S |
| 2007-08-20 | Sharp | Added new page for EL-808 LCD |
| 2007-08-07 | Olivetti | Added M24, E24CR, D26GT. |
| 2007-07-20 | Burroughs | Added J524, J700, J1624. |
| 2007-06-27 | Small adding machines | Extensive revisions and additions. |
| 2007-06-19 | Friden | Added Friden D10 |
| 2007-06-19 | Calculating machines | Added "What's new" page. |
| 2002-12-14 | Site on-line at www.vicnet.net.au/~wolff |