ELKA 53

Details:

Although more than 40 years old, this machine is in near mint condition and works perfectly for all functions. The rather low serial number might indicate that this calculator is a very early one.  
It uses 17 vacuum fluorescent tubes to form the display.  The left most tube contains a  memory-in-use  indicator for memory  I and  II. The next tube contains the overflow/ error indicator.  
The high quality keyboard uses reed relays which were often used those days.  When a key is pressed it moves a magnet along the read relays thereby closing its contact.


Usage:

Addition, Subtraction, Multiplication and Division:

 Work as usual today.  There are two memories:  I and II.   The “M+” and “M-” keys operate in these memories.


Function of other keys, switches etc.:

  1. 120 “%” 10 = 12        (12 = 10% of 120)
  2. 120 “/%” 10 = 1200   (120 = 10% of 1200)
Calculator InfoRepair information & pictures of internals
Elka 53Elka 53Elka 53
Elka 53
Elka 53

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Serial number:

Build in:

Functions:

Market-introduction:

Production until:

Price:


001170

1976 ?  by  Orgtechnika

Addition, Subtraction, Multiplication,  Division, Square Root, Percentage Calculations

1976 ?  (My machine contains  some IC’s with prints indicating 1976 as year of production)

 ?

No prices found.  However in 1976 machines with one memory and 12 digit display were priced between DM 70 and 150.  This beauty might well be close to  DM 150.