Vintage Sharp ELSI MATE EL-230B Portable Basic Calculator
CONDITION: NEW / SEALED IN PACKAGE - the packaging has been folded in half but still sealed. Powers on (as pictured) through the plastic.
Vintage 1982 CASIO LC-311C Portable Basic Calculator
CONDITION: NEW / SEALED IN PACKAGE - the "try me" function through the plastic no longer works (assuming the almost 40 year old battery is dead). The power source is 2x1.5V cell.
The Casio LC-311 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 6 functions, 24 keys, and an LCD (liquid crystal) display.
| Type | Arithmetic |
| Functions | 6 |
| Keys | 24 |
| Precision | 8 |
| Logic | Algebraic |
| Display type | LCD |
| Length | 109mm |
| Width | 64mm |
| Thickness | 8mm |
| Power Consumption | 0.000280W |
| Power Source | 2x1.5V cell |
| Year introduced | 1982 |
| Year discontinued | 1982 |