| Brand | Olivetti Underwood |
|---|---|
| Model | Summa Quanta 20 |
| Featured Refinements | Vintage Adding Machine |
| Maker | Olivetti Underwood |
Check the listing for details. Vintage Olivetti Underwood Summa Quanta 20 Adding Machine Manual Working. Listed at 58.00 USD. In good condition it might need red and black ink as it’s very light. I don’t know how to use it but is great for collectors or someone who knows.
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