| Type name / number: | MADAS-VII max |
| Production / SN: | 4770 |
| Calculating principle: | Stepped Drum |
| Calculating functions: | Add, Subtract, Divide Multiply |
| Input accuracy | 7 , 7 digits |
| Calculating accuracy: | 11 digits |
| Extra's: | automatic divide |
| Designer: | Erwin Jahn, Otto Steiger, Hans W. Egli |
| Production year: | ~1914 / 1915 |
| Case material: | Brass top plates. The cap is of steel plate. The house side walls are of steel. The middle part consists of a kind of pressed paper(???) covered with steel plate, fastened with small rivets. |
| Weight: | 12.5 Kg |
| External links: | Gerald Suadan (MADAS web site). |
| Previous owner: | The father in law of Roy , Hoofddorp, the Netherlands |
| Cosmetic imperfections: (I accuse no one) |
Some paint is loose and disappears. some rust area's. The handle was covered with a rubber knob. This is hand made by the previous owner and not original so removed. |
| Date of receiving: | 2016-04-08 |
| Machine story: | 2016-04-08 first calculation check shows slider one is blocked. Rest is adding / multiplying. 2016-04-11 With the appreciated instructions from Gerald Sudan (MADAS website) I pulled the machine out of the house. A relatively clean machine was popping up. With a little bit of help the first digit slider is working again. I took some pictures to show the ex and internals as received. |
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