From: Frank Boehm
Email:
There are numerous models labeled "Addo X" - ranging from electro-mechanical to electronic calculators. I don't think there is a real market for electro-mechanical ones, unless they are at least 70 years old (metal scrap will be 2-3 EUR); electronic ones are of much more interest, using ebay is the best option. Depending on model, it might be worth 1-100 EUR.
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