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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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Jan 9

Berkey Keystone 4030 renovation

Hi every one, I have just joined your Google group. I am currently renovating that old Keystone 4030

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Berkey Keystone 4030 renovation

Hi every one, I have just joined your Google group. I am currently renovating that old Keystone 4030

Jan 9

steven wolpow, … alan-uk6

12/20/25

Marchant Figuremaster needs to be repaired to working order

Unfortunately you have chosen one of the most complicated mechanical adding machines there is. The

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Marchant Figuremaster needs to be repaired to working order

Unfortunately you have chosen one of the most complicated mechanical adding machines there is. The

12/20/25

Don DiGalbo, h100s...@sonic.net2

11/19/25

Monroe Surveying Calculator

I find it curious that the Litton-Monroe calculators themselves are more plentiful than the user and

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Monroe Surveying Calculator

I find it curious that the Litton-Monroe calculators themselves are more plentiful than the user and

11/19/25

11/17/25

Help identifying a desk calculator? memory board...

Hello All, I have a circuit board I'm trying to identify. This exact model of circuit board was

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Help identifying a desk calculator? memory board...

Hello All, I have a circuit board I'm trying to identify. This exact model of circuit board was

11/17/25

11/3/25

Brunsviga 20 Springs

Attached is a photo of the springs and plates in question! On Tue, 4 Nov 2025, 00:06 Adam S, <adam

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Brunsviga 20 Springs

Attached is a photo of the springs and plates in question! On Tue, 4 Nov 2025, 00:06 Adam S, <adam

11/3/25

John Murphy, Derrick Bell2

10/25/25

Sharp Elsi Mate EL-420M

I think I have one...I kind of ripped it apart To fix display and I could only get it partly to work.

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Sharp Elsi Mate EL-420M

I think I have one...I kind of ripped it apart To fix display and I could only get it partly to work.

10/25/25

9/25/25

Looking for a museum to donate a collection of mechanical calculators

Hi calculator collectors! A good friend of mine has rebuilt about 100 to 200 mechanical calculators -

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Looking for a museum to donate a collection of mechanical calculators

Hi calculator collectors! A good friend of mine has rebuilt about 100 to 200 mechanical calculators -

9/25/25

Jean van Lerberghe, … Tarkan A4

9/25/25

old calculators: any interest in europe?

Can anyone Tell what this old calculator ia worth? Gordon Bendall <gordon....@gmail.com>

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old calculators: any interest in europe?

Can anyone Tell what this old calculator ia worth? Gordon Bendall <gordon....@gmail.com>

9/25/25

Robin lemer, … Jack Rubin4

8/29/25

Mercedes Fritz Palm [Berlin] adding machine

:>) From: oldcalcul...@googlegroups.com <oldcalcul...@googlegroups.com> On

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Mercedes Fritz Palm [Berlin] adding machine

:>) From: oldcalcul...@googlegroups.com <oldcalcul...@googlegroups.com> On

8/29/25

Sirous Nekooei, Francisco Vazquez2

8/6/25

Canon P-10 D help

Hello. I'm attaching photos of my calculator. If you need more photos please let me know. Note:

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Canon P-10 D help

Hello. I'm attaching photos of my calculator. If you need more photos please let me know. Note:

8/6/25

Pontus Pihlgren, JAY RESPLER3

8/4/25

For sale: Wang 362E with accessories

If I didn't already have one :) I'm more into even older stuff like DEC PDP and similar

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For sale: Wang 362E with accessories

If I didn't already have one :) I'm more into even older stuff like DEC PDP and similar

8/4/25

7/28/25

Marchant KB --> KE calculator looking for a new home

Hello Group, I have an early Marchant KB rotary calculator which has been converted to electric drive

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Marchant KB --> KE calculator looking for a new home

Hello Group, I have an early Marchant KB rotary calculator which has been converted to electric drive

7/28/25

Alan Jones, … Owen Savill7

7/26/25

Anita mk 9, 10, 11 and 12 calculators

Hi Sheila, so sorry to hear about Alan, of course I understand about cancelling the visit. I hope he

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Anita mk 9, 10, 11 and 12 calculators

Hi Sheila, so sorry to hear about Alan, of course I understand about cancelling the visit. I hope he

7/26/25

calcucris, machinea...@wanadoo.fr2

6/10/25

LeHigh calculator

Hello Cris No for me Christophe De : oldcalcul...@googlegroups.com <oldcalculatorforum@

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LeHigh calculator

Hello Cris No for me Christophe De : oldcalcul...@googlegroups.com <oldcalculatorforum@

6/10/25

Don R (Xerox6085), … Rick Bensene7

6/9/25

Rick Bensene - Old Calculator Museum

Hi, Chris, Thank you so kindly for your thoughtful message. I'm doing pretty well, considering

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Rick Bensene - Old Calculator Museum

Hi, Chris, Thank you so kindly for your thoughtful message. I'm doing pretty well, considering

6/9/25

Stephan Vanderlooven, J Ongena2

5/24/25

Dag Stephan, mijn email is jefo...@gmail.com. Laat maar weten wat er scheelt aan je rekenmachine.

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Dag Stephan, mijn email is jefo...@gmail.com. Laat maar weten wat er scheelt aan je rekenmachine.

5/24/25

Cristian Arezzini, … Rich Walker25

5/5/25

Two new-old-stock Olivetti Divisumma 24

Hi Mark, Thank you very much for these links, it looks like the documents will be very useful to me.

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Two new-old-stock Olivetti Divisumma 24

Hi Mark, Thank you very much for these links, it looks like the documents will be very useful to me.

5/5/25

snek...@gmail.com, … Nigel T5

4/16/25

Introducing My Vintage Calculator Collection Website

Dear Steve, Dear @mg Dear Nigel Tout Dear Jef Ongena Thank you all so much for your thoughtful and

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Introducing My Vintage Calculator Collection Website

Dear Steve, Dear @mg Dear Nigel Tout Dear Jef Ongena Thank you all so much for your thoughtful and

4/16/25

3/11/25

1973 Unisonic calculators (1212 and 737)

Hi all, Does anyone happen to have the Instruction Manual / User manual for either the Unisonic 1212

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1973 Unisonic calculators (1212 and 737)

Hi all, Does anyone happen to have the Instruction Manual / User manual for either the Unisonic 1212

3/11/25

Condomínio Magnólia, … Louis Angelucci5

3/6/25

Sales of old calculators

Sorry, Louis, I just want to sell. I don't have time to continue with this anymore. I'm going

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Sales of old calculators

Sorry, Louis, I just want to sell. I don't have time to continue with this anymore. I'm going

3/6/25

Geoff Poskitt, … alan-uk5

2/16/25

Brunsviga 13RM renovation

Thank you Alan, Good to hear that oil and patience can work. And indeed my calculator is working very

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Brunsviga 13RM renovation

Thank you Alan, Good to hear that oil and patience can work. And indeed my calculator is working very

2/16/25

kamonwan und joerg steinke, … René Henry3

2/4/25

CASIO COLLEGE FX very very RAR

Je possède une collection de près de 800 calculatrices de ce type et bien sûr des plus rares encore.

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CASIO COLLEGE FX very very RAR

Je possède une collection de près de 800 calculatrices de ce type et bien sûr des plus rares encore.

2/4/25

kamonwan und joerg steinke, … Douglas Miller4

1/28/25

Casio FX-602 P Vinted same new

I would suggest posting a link to the ebay sale on the list, as that will probably get to Rick the

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Casio FX-602 P Vinted same new

I would suggest posting a link to the ebay sale on the list, as that will probably get to Rick the

1/28/25

La Ymir Gryffindor

1/28/25

La Ymir Gryffindor unread, 10:04 (6 minutes ago) to oldcalcul...@googlegroups.com I tried to email

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La Ymir Gryffindor unread, 10:04 (6 minutes ago) to oldcalcul...@googlegroups.com I tried to email

1/28/25

Gideon Huddleston

12/2/24

RARE!! BUSICOM LE-120A calculator

I have this busicom le-120a calculator. I know it's a rare calculator so I'm wanting to know

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RARE!! BUSICOM LE-120A calculator

I have this busicom le-120a calculator. I know it's a rare calculator so I'm wanting to know

12/2/24

11/24/24

Tiger calculator manual?

I have a working Tiger mechanical calculator (1930s) that I want to give as a gift. It would be great

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Tiger calculator manual?

I have a working Tiger mechanical calculator (1930s) that I want to give as a gift. It would be great

11/24/24

Andrew Clark, Gordon Bendall2

10/26/24

Marchant Deci-Magic Information

Photos available of ACT10M internals if that would help? Can you be more specific about the problem

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Marchant Deci-Magic Information

Photos available of ACT10M internals if that would help? Can you be more specific about the problem

10/26/24

Seth Lipkin, … mfr...@rcn.com10

10/17/24

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

Hi Cris, If you ever come to the US I'd be happy to show you Astronomical skeleton clock Mark

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

Hi Cris, If you ever come to the US I'd be happy to show you Astronomical skeleton clock Mark

10/17/24

more...@gmail.com

9/27/24

Anita MK 9 restoration - again

Hello! I have Anita MK 9, and I am trying to repair it for years. I have exchanged broken dekatron

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Anita MK 9 restoration - again

Hello! I have Anita MK 9, and I am trying to repair it for years. I have exchanged broken dekatron

9/27/24

9/17/24

Springs information

I'm currently working on a Brunsviga 13RK, and had to dismantle the rotor with its W-shaped

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Springs information

I'm currently working on a Brunsviga 13RK, and had to dismantle the rotor with its W-shaped

9/17/24

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