| Type name / number: | Adding and listing Machine, Summa-15 |
| Production / SN: | 70092 |
| Calculating principle: | Rocking Segment and Ten key keyboard |
| Calculating functions: | Add |
| Input accuracy | ? digits |
| Calculating accuracy: | ? digits |
| Extra's: | |
| Designer: | |
| Production year: | |
| Case material: | |
| Weight: | Kg |
| External links: | |
| Previous owner: | Karl-Dieter Schwake, Berlin, Germany (picked up during summer holidays.) |
| Cosmetic imperfections: (I accuse no one) |
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| Date of receiving: | 2010 - july |
| Machine story: |
Content without guarantee! (UK); In halt Ohne Gewähr! (DL)