Terminated: unknown
Please take a look at the Rockwell 63R for more information.
There is an article about this calculator on the National Museum of American History website here (link validated 2025-12-06).
| Brand: | Radio Shack |
| Model: | EC-490 |
| Type: | Scientific calculator |
| Picture: |
|
| Batteries: | Built-in accu |
| Lifetime: |
Introduced: 1976 Terminated: unknown |
| Notes: |
This is Radio Shack’s version of the
Rockwell 63R
but with different key colours.
Please take a look at the Rockwell 63R for more information. There is an article about this calculator on the National Museum of American History website here (link validated 2025-12-06). |
©2025 Ernst Mulder