Addiator

Addiator is a calculating tool.

Overview

Catalogue entries for instruments state maker, signature, completeness and working condition. VALÉORINE records this subject so that lots referring to it can be described consistently.

In detail

mechanical add/subtract calculator

Sources

Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.

reference work · Reputable secondary · Wikipedia
“Slide calculator”, English Wikipedia, consulted as further reading
Consult the source
reference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q140690: Addiator
Consult the source