OldCalculatorForum

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Welcome to the Old Calculator Forum for discussion of mechanical and early electronic calculators, especially those of the time of rapid technical development before 1980.

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willybill winkle, Nik Barbour2

Jul 5

Old desktop calculator

There's one on ebay this week. £30 buy it now (so not in an auction). Link = https://www.ebay.co.

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Old desktop calculator

There's one on ebay this week. £30 buy it now (so not in an auction). Link = https://www.ebay.co.

Jul 5

mg, … Piotr Jachymczyk14

Jul 5

Mechanical calculator repair manuals uploaded to archive.org

Hello, I just wanted to everyone to know that I uploaded quite a few materials for Addo and Facit

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Mechanical calculator repair manuals uploaded to archive.org

Hello, I just wanted to everyone to know that I uploaded quite a few materials for Addo and Facit

Jul 5

Jun 8

ODHNER Mechanical Calculator

Good Morning, I have an ODHNER mechanical calculator Serial No 29-273455 Made in Sweden. Can anybody

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ODHNER Mechanical Calculator

Good Morning, I have an ODHNER mechanical calculator Serial No 29-273455 Made in Sweden. Can anybody

Jun 8

May 29

I am looking for any dead/nonfunctional HP48GX (not the HP48G) to use as parts for repairing my unit.

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I am looking for any dead/nonfunctional HP48GX (not the HP48G) to use as parts for repairing my unit.

May 29

Seth Lipkin, Arthur Rosen3

May 19

Antique mechanical collection, including Millionaire, TIM (Time Is Money), etc.

Excellent suggestion, thank you! On Tuesday, May 17, 2022 at 8:09:55 AM UTC-4 artro...@gmail.com

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Antique mechanical collection, including Millionaire, TIM (Time Is Money), etc.

Excellent suggestion, thank you! On Tuesday, May 17, 2022 at 8:09:55 AM UTC-4 artro...@gmail.com

May 19

Stephen Walters

May 18

Anyone looking for cheap summer project?

https://www.ebay.co.uk/itm/403656657929

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Anyone looking for cheap summer project?

https://www.ebay.co.uk/itm/403656657929

May 18

May 7

Hi, to your information: for sale. Compucorp 322G Micro-Computer, 1. progr. pocket calculator: https:

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Hi, to your information: for sale. Compucorp 322G Micro-Computer, 1. progr. pocket calculator: https:

May 7

Bradley Fechner, Paulos, Richard G4

Apr 29

Wanted - HD3112 Serial BCD Adder IC for Casio 121-b Repair

Some info on the HD3112 chip: http://madrona.ca/e/eec/ics/serialadders.html here is a non-working

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Wanted - HD3112 Serial BCD Adder IC for Casio 121-b Repair

Some info on the HD3112 chip: http://madrona.ca/e/eec/ics/serialadders.html here is a non-working

Apr 29

Apr 15

Looking for any calculator that uses the same printhead as Sharp EL-2630g (no II proceeding)

On Friday, April 15, 2022 at 8:37:36 AM UTC-4 Mark Pagliaro wrote: Model 400 is written on the print

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Looking for any calculator that uses the same printhead as Sharp EL-2630g (no II proceeding)

On Friday, April 15, 2022 at 8:37:36 AM UTC-4 Mark Pagliaro wrote: Model 400 is written on the print

Apr 15

Gordon Geist, Paolo Cravero2

Mar 24

Need Schematic for Texas Instruments PC-100C Security Cradle/Printer for TI-59/58

Gordon I cannot help you with the diagram, but I have reverse-engineered a K-80W calculator board

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Need Schematic for Texas Instruments PC-100C Security Cradle/Printer for TI-59/58

Gordon I cannot help you with the diagram, but I have reverse-engineered a K-80W calculator board

Mar 24

Mar 22

Vintage Calculator Collection Available in San Francisco

Hello Folks, My late brother was a passionate lifelong collector of vintage calculators. His

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Vintage Calculator Collection Available in San Francisco

Hello Folks, My late brother was a passionate lifelong collector of vintage calculators. His

Mar 22

ficolossale, … Mike Hatch4

Mar 10

My Olympia RAE 4/30 has suddenly died?? :( :( :(

Use a variac, most old electronic will operate at lower inputs, it allows you to bring the power up

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My Olympia RAE 4/30 has suddenly died?? :( :( :(

Use a variac, most old electronic will operate at lower inputs, it allows you to bring the power up

Mar 10

Mar 2

Sumlock Anita Mark 8 at Auction

Sumlock Anita Mark 8 up for auction at RR Auction in Boston. Don't have the funds now, thought

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Sumlock Anita Mark 8 at Auction

Sumlock Anita Mark 8 up for auction at RR Auction in Boston. Don't have the funds now, thought

Mar 2

Feb 25

Re: [oldcalculatorforum] Brunsviga 13 / 20 main drum; how to change 10 carry disks?

Is the bolt cylindrical or does it have a variable diameter? In the second case you have to hit on

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Re: [oldcalculatorforum] Brunsviga 13 / 20 main drum; how to change 10 carry disks?

Is the bolt cylindrical or does it have a variable diameter? In the second case you have to hit on

Feb 25

Eduardo Paulisa

Feb 13

how to open Bowmar Count calulator

Hello, I recently purchased a Bowmar Count calculator. it has an AC input however I dont know what

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how to open Bowmar Count calulator

Hello, I recently purchased a Bowmar Count calculator. it has an AC input however I dont know what

Feb 13

Galgano Guidotti

Feb 12

Hello everyone!

Hello, I'm the lucky (?) owner of a BRUNSVIGA NOVA 13 Matr. 130421. Unfortunately, the machine

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Hello everyone!

Hello, I'm the lucky (?) owner of a BRUNSVIGA NOVA 13 Matr. 130421. Unfortunately, the machine

Feb 12

Jan 25

Re: [oldcalculatorforum] Abridged summary of oldcalculatorforum@googlegroups.com - 1 update in 1 topic

I think I have made a breakthrough! From John Wolff's Australian website, there is an Olivetti

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Re: [oldcalculatorforum] Abridged summary of oldcalculatorforum@googlegroups.com - 1 update in 1 topic

I think I have made a breakthrough! From John Wolff's Australian website, there is an Olivetti

Jan 25

Paul T, Ed Spittles5

Jan 24

Help identifying an old calculator...from some vague recollections

Hi Ed, I looked at the "busicom" imagery in the link and pretty sure that wasn't it.

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Help identifying an old calculator...from some vague recollections

Hi Ed, I looked at the "busicom" imagery in the link and pretty sure that wasn't it.

Jan 24

Jan 10

HP25, HP67, Timex Sinclair 1000, Post-Hemmi Bamboo Slide Rules, and more! (FSBO)

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HP25, HP67, Timex Sinclair 1000, Post-Hemmi Bamboo Slide Rules, and more! (FSBO)

Jan 10

Thomas Kirchhof

12/16/21

Victor 500-series with 9 columns - what model no.?

Hello, today i got an old Victor adding machine, sn 218871 (built maybe ca.1934?) It's very

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Victor 500-series with 9 columns - what model no.?

Hello, today i got an old Victor adding machine, sn 218871 (built maybe ca.1934?) It's very

12/16/21

Roland, … Steve6

12/10/21

Anita MK8 on Ebay

So, was this a mark-8 or a mark-9 ? Do you know what it sold for? Thanks On Friday, August 9, 2019 at

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Anita MK8 on Ebay

So, was this a mark-8 or a mark-9 ? Do you know what it sold for? Thanks On Friday, August 9, 2019 at

12/10/21

Steve, Arthur Rosen2

12/10/21

I posted a listing of my 160 or so adding machines and calculators on the forums website. I listed it

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I posted a listing of my 160 or so adding machines and calculators on the forums website. I listed it

12/10/21

12/10/21

Sumlock Anita Mark-8

Does anyone know how much a Sumlock Anita Mark-8 calculator sell for currently. Are they possible to

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Sumlock Anita Mark-8

Does anyone know how much a Sumlock Anita Mark-8 calculator sell for currently. Are they possible to

12/10/21

n b, … epo...@gmail.com4

11/22/21

Help! Vintage Exodus LC-103 Mini Calc.

Hi this model is referenced as Type 262 in my inventory: http://www.epocalc.net/pages/mes_types_01.

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Help! Vintage Exodus LC-103 Mini Calc.

Hi this model is referenced as Type 262 in my inventory: http://www.epocalc.net/pages/mes_types_01.

11/22/21

11/19/21

Gem chain adder - 5 columns rare?

Hello! New member here :) I recently acquired a Gem adding machine. These were advertised back in the

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Gem chain adder - 5 columns rare?

Hello! New member here :) I recently acquired a Gem adding machine. These were advertised back in the

11/19/21

11/8/21

Hullo all! I happened to find a Royal 112 TD at a thrift shop the other day, and it works for the

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Hullo all! I happened to find a Royal 112 TD at a thrift shop the other day, and it works for the

11/8/21

Helen May, … Enrique Marset7

10/24/21

NEW PERMANENT EXHIBITION OF CALCULATORS AT THE UNIVERSITY OF ZARAGOZA (SPAIN). PART I

https://www.eldiario.es/hojaderouter/tecnologia/hardware/telesincro-factor-p-factor-s-joan-majo-

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NEW PERMANENT EXHIBITION OF CALCULATORS AT THE UNIVERSITY OF ZARAGOZA (SPAIN). PART I

https://www.eldiario.es/hojaderouter/tecnologia/hardware/telesincro-factor-p-factor-s-joan-majo-

10/24/21

10/23/21

Sell Calculator Busicom 141-pf

https://es.wallapop.com/item/calculadora-busicom-141-pf-vintage-697720326

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Sell Calculator Busicom 141-pf

https://es.wallapop.com/item/calculadora-busicom-141-pf-vintage-697720326

10/23/21

Christophe MERY, … Machine A Calculer5

10/19/21

Merci Marc Et merci pour le don Christophe Télécharger BlueMail pour Android Le 17 oct. 2021, à 15:30

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Merci Marc Et merci pour le don Christophe Télécharger BlueMail pour Android Le 17 oct. 2021, à 15:30

10/19/21

CliffS, Kenton Green2

10/13/21

Mechanical Calculators at SFO Airport

Thanks for setting this display up and sharing with the world. On Wednesday, September 29, 2021 at 1:

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Mechanical Calculators at SFO Airport

Thanks for setting this display up and sharing with the world. On Wednesday, September 29, 2021 at 1:

10/13/21

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