Details:

This machine uses the same latched wheel construction which all Hamann calculators share as well as the same way an automatic division is performed.  

Apparently it origins from the Belgian army.

Usage:

Addition/subtraction:

Enter a number and hit the “+” or the “-” key.

Multiplication:

Start on the utmost left.  Enter the first number and store it in the main register by hitting the “I” key.  Press  the “+” key until the counter has reached the desired least significant number.  Then move the carriage one position to the right.  Press  the “+” key until the counter has reached the desired next 2nd significant number etc..

Division          

Push the “:” button in the right  (it should stay pressed-down). Push the “-->” button.  The carriage moves to the right to the divide position shown by the red arrow.  Enter the first number and push the “+” key to store it in register III. Enter the second number and hit the “I” key to store it in register “I”.  Now push the “<--” key to start the division.  

Function of some keys, switches etc

• The utmost left green button reverses the direction of the counter (subtract instead of add and vice versa)
• The right  arrow-up button transfers the contents of result register III to register I.  Register I must be cleared beforehand with the “I” button.
• If enough accuracy has been reached, a division can be stopped by pressing the small green button just above the white 7-key.
• If the machine doesn’t end the division process, e.g. when divided accidentally by zero, the machine can be stopped by pressing the small chrome button on the carriage left from digit 16.

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Serial number:

Built in:

Functions:

Rotation speed:

Market-introduction:

Production until:

Price:

102 266

1956

Addition, Subtraction, Half automatic Multiplication and  Fully automatic Division

360 rot/min

1954

1959 (Known serial numbers run from 102.001 - 105.000)

DM. 2465,- in 1956 (Source: 1956 price table)