David Butleradded December 12, 2019

This was another member of the Exactra line produced by Texas Instruments. This was a simple calculator with eight numeric positions and a single space for a negative sign. It was reduced in July 1974 as a budget model.
I thought this calculator was fairly unremarkable. However, I opened mine up and compared it to some images of the display technology on Datamath.org. It looks like my display matches a prototype Exactra 21. However, mine has a serial number, while their prototype does not. I've included comparison shots, so see for yourself.