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| Date | 2008-06-02 |
| Message | Hello Skylar,
It's most welcome to have a comment from a member of the Friden family. Yes this old C10 calculator (under Site Map, see Friden ) is performing basic addition and subtraction quite well -- amazing for its age. (The C10 performed automatic division, but I don't have that working yet.) It would be nice to have a wiring diagram for the C10. The wiring seems quite simple but it appears this machine has a short somewhere. Thank you for your comment and if you find anything that might be of help, I'd be most grateful. I hope to get this working and post some information and photos about how these amazing old mechanical machines worked. Best regards, -RetroCalculators |
| Date | 2008-06-01 |
| Location |  |
| Message | My grand-daughter asked me about abacuses, and I was delighted to come across your site and your great demonstration. many thanks |
| Date | 2008-05-27 |
| Location |  |
| Message | Hello, I saw your video and the problem you are having. So the calculator works fine otherwise? wow I will take a look and see if we have one on hand to compare. Well just thought I would post something so that people can see Fridens still exist  . Thanks |
| Date | 2008-05-22 |
| Message | I'm a big fan of these unusually shaped figure-eight adders. A Webb Adder is generally worth more than Victor or other off-brand figure eight adders. The older models are worth more, and those with a nice wood base generally are worth the most. On ebay the plain Victor Adder shown on this site might fetch $100-$200. A brass Webb Adder on a wood plate in good condition perhaps $500, but prices vary quite a bit -- good luck! -RetroCalculators |
| Date | 2008-05-20 |
| Location | |
| Message | I have either a Webb or Victor figure eight adder, I will have to check to be sure which it is. The adder is in great condition, it belonged to my dad's aunt so I know that it's been around for a while. I was wondering what the value of it and how to go about selling it for what it's worth. It would be easier for you to e-mail me, rather than call me at first. I work nights and I sleep during the day. Please give me your input on this. Thank you, Ronnie |
| Date | 2008-04-27 |
| Message | The Curta appears often on ebay; the final price varies quite a bit, but around $800 I'd say. Good luck! and thanks for your comment -RetroCalculators |
| Date | 2008-04-22 |
| Location | |
| Message | That Curta is amazing. Where could a person find one of those and what would be a fair price to pay? |
| Date | 2008-04-06 |
| Message | Kate wrote: >Your finger useage was incorrect. A soroban operator uses his/her right thumb to add one (Earth) beads, and his/her right index finger for all other... You are right. I've not been abacus trained but I've heard that proper fingering is essential to becoming fast. Thanks for your comments - and kind regards, -rich |
| Date | 2008-04-01 |
| Message | I loved your abacus demonstration, but there's one aspect that was incorrect, a formality, really. Your finger useage was incorrect. A soroban operator uses his/her right thumb to add one (Earth) beads, and his/her right index finger for all other operations, like adding/subtracting five (Heaven) beads, and subtracting one (Earth) beads. It's supposed to be a matter of efficiency, even though so far I haven't seen any information to support that, so I guess it's more a matter of tradition. Keep it up, your site is a very nice resource! |
| Date | 2008-03-13 |
| Message | The manufacturer is somewhat important (is it 'Original Odhner'?), and the age/condition. If it has a wood base and a cover , that adds considerably (especially if the wood looks good). I'd put a range of say 40GPB for a non-working common model with no wood, to perhaps 150GPB for one that is clean and working and has nice wood. eBay is fickle and the final price could fetch more, or less (and I'm no expert in valuation). Good luck! -rich |
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