This was a neat little side project...

Vintage TI-1790 Calculator





After years of changing batteries the battery holder leads needed to be replaced. Client had globs of solder on the pads but it was easily to clean up.



Replaced the wires...





Soldered it back together....




Screen is sad but he still uses it for the alarm function. Said he purchased it through either Brand Names or Century. Two local businesses that have gone away....





Looks like a few different people made these

Withthe TI-1790 DataChron Texas Instruments introduced acalculator combined with a clock, alarm-time and stopwatch function. Togetherwith the stylish metal housing and the leather wallet it was a "must have"of 1978.

http://www.datamath.org/BASIC/LCD_Classic/TI-1790.htm