Type name / number: Adding and Listing machine, Continental 9S (hand driven)
Production / SN: P47297
Calculating principle: Rocking Segment with full keyboard
Calculating functions: Add and Subtract.
The machine performs direct subtraction, but shows nine complements rather than true values when the balance goes negative.
Input accuracy: 8 digits
Calculating accuracy: 9 digits
Extra's:  
Designer: John E. Greve (as well founder of the Astra-Werke)
Production year: 1930 - 1950
Case material: Aluminium
Weight: 9,5 Kg
External links:  
Previous owner: ?
Cosmetic imperfections:
(I accuse no one)
 
Date of receiving: ?
Machine story: 2012-
This 1.50 euro machine is purchased for demo (please see the 2e 9S),

2014-06-24
This machine was blocked and had some printing problems, but I took the challenge to give the repair a change.

After:
- loosing the shifters below the key board (normal for this construction of the high flanges)
- replace the printing pushing roles, they where gone. I made two from an other roll (not Continental so the dimensions have to be adjusted at my little lathe machine).
- repair the printing lined up. Only the lower part of the digits where printed. The same at the total sum printing, so not depended on the keyboard settings. Puzzling for a few day's what the possible coarse might be. After a while I noticed that the oil attenuation was not done his work. The nut was below in the machine. Screwed that in an impossible location, but I got it done. Even a secure nut. This pulls the printing mechanism on the position and the printing was good again!!
- The function symbol printing was always printed minus symbol, when a plus was executed. The others where not right as well. I saw that a gable type of construction is setting the right length for the function symbol printing. It was bent after wrong mounting the keyboard. It was by force shifted below some plates. Demount the key board and the long plate (to bend it in the good shape) mount the two and bend the pawl to fit in the good trap.

So the machine was in perfect working condition again.

Content without guarantee! (UK); Inhalt Ohne Gewähr! (DL)