Monroe The Calculator Company: 1924,1956,1964,1970
For back to school, consider the 1970 model:
- The smallest CRT-display desktop calculator in the world.
- 11 inches wide by 17 inches deep
- Weighs only 14 pounds
- When computation exceeds the 14-digit limit, the green read-out flashes on and off and a buzzer warns the operator.
- Priced at $895
source: theoldcalculatormuseum (also this page)