About Me

My name is John Scriven.  I live in Reading, Berkshire (UK), and have been collecting calculators and adding machines since the beginning of 2013.  My background is in science.  My first memory of mechanical calculators was at school when I was about 9 (in 1970), where we had three calculators.  Judging from memory, I’m guessing that they must have been Original-Odhner 1049s. It’s a shame that I’ll never know for certain.  Of course, by the time I was 12, the machines were obsolete.

I wish to give thanks to the internet, and eBay in particular.  But mostly, I give thanks to Jane for putting up with me and my obsessions.


Please feel free to comment.  I can be contacted at:



I also collect mechanical analytical balances, but that’s another story!

7 thoughts on “About Me

  1. your grandson sais: wow amazing description i haven’t looked at all the links but i like how you have done all that work thankyou for putting up your website.


    • Hi – I’m mailing you from South Africa. My grandfather was a banker all his life. All my life we had this ugly green machine standing around being in the way of everyone after he passed away. No one knew what it was and what it does. I wiped the dust off the machine and noticed the name – it read “Facit”.
      So, I go and google it. Lo and behold I find your website. Wow. Finally I have a life’s riddle solved. It is a Facit NTK machine serial nr: 499032.
      I have just placed the machine up for sale on OLX since I now know what I have. 🙂


  2. Hi, great page I must say. I’ve just purchased a Monroe calculating machine this week and have been finding it difficult to get any information on it. I’ve gone through hundreds images and sale listing and have yet to see mine. It’s a gray steel cased machine with a back plate marked J164727. One site mentioned J models being quite rare and I’ve yet to see a similar one. If you email me back I would gladly send pictures if you’d like. Thank you!!


  3. Hi Shawn,

    I got a blue machine a year ago. I have just take a look in to the machine and found that it was Original Odhner machine.
    The machine came with Germany manual.
    Getting the information from your website, I have found that it was 127 model.
    Thanks again.

    Best Regards,
    Chanin T.


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