Santronic - vintage calculator

Model name: SANTRONIC 80
Maker: SANTRON ELECTRONICS, CO., LTD.
Year of introduction: 1975
Power: adapter or 4xAA battery, DC 6V 0.3W
Display Type: Vacuum Fluorescent Display
Number of digits: 8 1/2
Circuit: Texas Instruments TMS0855NC
Weight/dimension: 152g (7.5 x 13.5 x 3 cm)

Above calculator is rare colector item - replica of the oldest calculator available free on Google Play.
This was my first calculator and as it is broken since long time ago, I made this reincarnation.
Remember the calculator was not capable of floating point calculations and accuracy is 8 decimal points only - enjoy!



Troubleshooting: if you have never used this device, please remember to always press C/CE twice if you want to start new calculation; as pressing only once will clear just last entered number, not the whole calculation.