Helec GT 537 (tip-in)
The Helec GT 537 is an arithmetic calculator with algebraic logic. It has 5 functions, 19 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is 5xAA.
Facts at a glance:
If you have a Helec GT 537 that is no longer working, you can first try replacing the 5xAA batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent.
We suggest the following current models as possible replacements: