Mechanical Calculators
Peripheral
| Peripheral root: | Peripheral |
| Type of peripheral: | Mechanical Calculators |
| peripheral in this class: | A.W. Faber-Castell 67/87 Rietz |
| peripheral in this class: | Nestler 23R |
| peripheral in this class: | ESR Digi-Comp I |
| peripheral in this class: | Open University Bobcat |
Mechanical Calculators in the collection.