Brunsviga 16E


The 16E is a machine with limited functionality.  Adverts state that it  contains fully automated division and semi automatic multiplication.

However, a division takes manual steps other machines have automated and multiplication, although motor driven, is controlled manually.

Its external design is outstanding and awarded with an IFA design award.  
It’s internal design is a bit special, using three solenoids.  One is used to disable all key pushes while the calculator is operating.  A second solenoid takes care of digit entry making it feel like an electric typewriter.  A third one is used to activate the clearance of the three registers.  The activation of the solenoids isn’t straightforward. It does take some circuitry that I personally didn’t expect.  If you want to know more about it, have a look at the diagrams in the assets corner of this website.



As usual for this type of machine


Enter the 1st number.
Push the X+  button for repeated addition of the least significant digit of the 2nd number.

Shift Reg-I one position to the left and repeat the above step for the next significant digit in the 2nd number, etc.


Enter the dividend.

Move Reg-I all the way to the left using the fat arrow button. Then push the ‘+’ key to enter the dividend in Reg-III.

Enter the divisor and again move Reg-I all the way to the left using the fat arrow button.

Start  the division by pushing the ‘:’ button.
The quotient appears in Reg-II,  the remainder is in Reg-III.

Note: after a division Reg-I does not return to its basic position.

Function of some keys, switches etc

Calculator InfoCIMG1204aS.jpgP1000931aSS.jpgP1000932aS.jpgP1000934aS.jpg

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Serial number:

Build in:


Rotation speed:


Production until:



Ca 1957 ?

Addition, Subtraction, Multiplication, Division

?  Set as low as possible (300 operations/min)


1957  (Büromaschinen Lexikon mentions it until 1961)

Ca. DM 1950,- in 1958;  DM 1680,-  in 1961 (from Büromaschinen Lexikon)

Repair information & pictures of internals Video Assets: Adverts, brochures etc. P1000950aS.jpg