# Casio 121-A (121A)

The Casio 121-A is an arithmetic calculator with 12 digits precision and algebraic logic. It has 4 functions, 15 keys, and a display using Nixie tubes. The power source is Solar.
**Note:** Desktop model.

## Facts at a glance:

Feature | Value |
---|---|

Type | Arithmetic |

Functions | 4 |

Keys | 15 |

Precision | 12 |

Logic | Algebraic |

Display type | Nixie |

Length | 127mm |

Width | 330mm |

Thickness | 102mm |

Power Source | Solar |

Year introduced | 1970 |

Year discontinued | 1971 |

## Replacements:

If you have a Casio 121-A that is no longer working, you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements: