Grampa Don
Yep, that's me
- Location
- Orange county, Calif.
In the 70's I bought my first digital watch and a scientific calculator. The watch was plastic and made by Texas Instruments. It had a red plastic face and you had to press a button to see the red LED display. The calculator also had red LED numbers. It still works and hangs on my wall in a shadow box. You may notice there is no equal sign. It uses reverse Polish notation like the early HP calculators.
