-
1975
Hardware Description
The Citizen 820SR is a scientific calculator with unknown digits precision and algebraic logic. It has 20 functions, 26 keys and a VFD (vacuum fluorescent) display.
-
Model Number:
820SR -
Manufacturer:
-
Hardware Type:
Calculator -
Manufacture Year:
1975 -
More Info:
-
We recognize our sponsors starting at $1 per entry.
Learn more at https://www.ithistory.org/benefits