Details:

Compared to other machines this was a very cheap calculator. To allow for the low price some concessions were done to functionality as well as the design. Unlike most other machines there is no display of entered digits and multiplication is only half-automatic.

Internally parts are light and mostly punched out of steel plate. Still, they appear to be reliable.

Usage:

Addition/subtraction:

As usual, using the “+” and “-” keys. Results appear in the lower register. The upper register is not used.

Multiplication:

Enter the first number. Push the “X” key. Enter the second number starting with the least significant digit.

Results appear in the lower register. The upper register is not used.

Division:

Enter the first number. Push the “DIV I” key. Enter the second number. Push the “DIV II” key.

Division now starts. Results appear in the upper register. The lower register shows the residual value.

Function of some keys, switches etc:

- The small red button clears the input and the division register. It’s used to correct erroneous input and after a division.
- The “C” buttton clears the product register (used after adding/subtracting/multiplication)
- “Div-stop” stops a division at any point during the division process.
- The small black button (named the ‘return stop key’) prevents clearance of the multiplication register in case of multiplication with a constant.

Example.: If you want to multiply 45x45 and 45x55 then input 45, press the “X” key, move the black button to the left untill it stops. Then enter 45. When done, press “C” to clear the result and press 55 for the next multiplication.

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Serial number:

Build in:

Functions:

Rotation speed:

Market-introduction:

Production until:

Price:

493 058 403

ca 1970

Addition, Subtraction, Half-automatic Multiplication, Automatic Division

?

1968

ca. 1972

Ca. DM. 1090,- in 1968 (Source: Büromaschinen Lexikon)

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