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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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Santo Nucifora, … Alexandru Floca10

Mar 1

Commodore 500E or Casio 101E documentation?

very nice, congrats! On Thursday, February 26, 2026 at 2:44:40 PM UTC+2 Santo Nucifora wrote: Just a

unread,

Commodore 500E or Casio 101E documentation?

very nice, congrats! On Thursday, February 26, 2026 at 2:44:40 PM UTC+2 Santo Nucifora wrote: Just a

Mar 1

Antonio, Alexandru Floca5

Mar 1

bad luck. i have the service manual for the Friden 1166 (Felix CE33) but exactly the two pages with

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bad luck. i have the service manual for the Friden 1166 (Felix CE33) but exactly the two pages with

Mar 1

jefo...@gmail.com

Feb 26

Looking for Anita Mk7 and Mk8 (partial of full) schematics ?

We are planning to undertake a restoration project on one of the few remaining Anita Mk7 calculators.

unread,

Looking for Anita Mk7 and Mk8 (partial of full) schematics ?

We are planning to undertake a restoration project on one of the few remaining Anita Mk7 calculators.

Feb 26

Feb 23

MADAS 16 FOR SALE

https://ebay.us/m/t1XOEE

unread,

MADAS 16 FOR SALE

https://ebay.us/m/t1XOEE

Feb 23

Greg L, Nigel T5

Feb 16

Thank you! I had found some of the above when I did a search. Appreciate the responses and your time.

unread,

Thank you! I had found some of the above when I did a search. Appreciate the responses and your time.

Feb 16

Pontus Pihlgren, … Alexandru Floca4

Feb 16

For sale: Wang 362E with accessories

an SGI Indy would be of interest?

unread,

For sale: Wang 362E with accessories

an SGI Indy would be of interest?

Feb 16

Jean van Lerberghe, … Alexandru Floca5

Feb 16

old calculators: any interest in europe?

what Friden calculator do you have? On Thursday, September 11, 2025 at 9:31:32 AM UTC+3 piojac...@

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old calculators: any interest in europe?

what Friden calculator do you have? On Thursday, September 11, 2025 at 9:31:32 AM UTC+3 piojac...@

Feb 16

Don R (Xerox6085), … Alexandru Floca11

Feb 16

Rick Bensene - Old Calculator Museum

Wish you all the best Rick, i found the topic and the chat as my email also didn't get trough. I

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Rick Bensene - Old Calculator Museum

Wish you all the best Rick, i found the topic and the chat as my email also didn't get trough. I

Feb 16

David Carter, … Patrick Souty46

Feb 15

Imperial Desktop Electronic Calculator

I was wrong when I wrote that my Berkey 4030 with a Rockwell chip 15473PA was using a 24V supply

unread,

Imperial Desktop Electronic Calculator

I was wrong when I wrote that my Berkey 4030 with a Rockwell chip 15473PA was using a 24V supply

Feb 15

Jan 9

Berkey Keystone 4030 renovation

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

unread,

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

unread,

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

unread,

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 -

unread,

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

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

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

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

unread,

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.

unread,

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

unread,

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

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