| Date | 2008-06-15 |
| Message | Hi Frank, It sounds like you have two adders, a Precise like the one shown on this site, and an American Can Company Adder. The Precise is slightly more valuable. On ebay you might get roughly $50 or so (Values vary a lot. I have found that European buyers are interested in this, so you might list worldwide, if possible). The American Adder is quite commonly found still. These typically don't garner more than $25 on ebay, unless they are in top shape. (If these adders are in great shape, post high quality pictures, and describe what works and doesn't. And you will get more bidders) Good luck! -RetroCalculators |
Private Message added 2008-06-14 |
Private Message added 2008-06-09 |
| 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 | 2008-05-22 |
| 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 | 2008-04-27 |
| 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 |
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