| Type name / number: | Adding and Listing machine, Continental 9S (hand driven) |
| Production / SN: | 81837 (no P in front of the serial number) |
| Calculating principle: | Rocking Segment with full keyboard |
| Calculating functions: | Add and Subtract. The machine performs direct subtraction and shows negative results as we use to see them nowadays and not the unseal seen nine complements notation at mechanical calculators when the balance goes negative. (It looks if it is one of the latest 9S versions.) |
| Input accuracy: | 8 digits |
| Calculating accuracy: | 9 digits |
| Extra's: | Positive negative result indicator true a hole in the case above the keyboard to the right. True negative result numbers on the printing role (please see at Calculation functions). The case is 2 mm thick aluminum and not painted with the characteristic structure paint, of most other continental machines. (All these never seen before at 9S versions in musea or on the other 9S versions in my collection). |
| Designer: | John E. Greve (as well founder of the Astra-Werke) |
| Production year: | 1930 - 1950 |
| Case material: | Aluminum 2mm thick instead of 0,75 mm thin plate (Seldom, thin plate more common) |
| Weight: | 9,5 Kg |
| External links: | |
| Previous owner: | R. Schneider, Baunach, Germany |
| Cosmetic imperfections: (I accuse no one) |
A few key tops missing a part of the number paint. A few locations paint removes on the case due to normal use. |
| Date of receiving: | 2012 - march, e-bay |
| Machine story: | Machine was operating well at arrival in a perfect condition in and out side. Key board cleaned and the vital locations oiled. Calculation test a few times all passed. |
Content without guarantee! (UK); Inhalt Ohne Gewähr! (DL)