Catalogued
Swingometer
- Made by
- Peter Milne; refined by David Butler and Robert McKenzie
- Year
- 1959
- Field
- Physical objects
- Kind
- Physical object
- Room
- Charts that compute — Placed by reading its description, not yet studiedCould also hang in: Parts of a whole
6 other forms share this skeleton
Source
BBC general election coverage, 1959
Attribution less certain: contested, or no single inventor recorded