![Circular slide rule](https://coimages.sciencemuseumgroup.org.uk/428/800/large_smg00046310.jpg)
Circular slide rule
Circular slide rule, Fowler "Magnum" long-scale calculator.
- Object Number:
- 1986-1142/1
- type:
- circular slide rule
- Image ©
- The Board of Trustees of the Science Museum
Circular slide rule, Fowler "Magnum" long-scale calculator, in fitted case with instruction booklet by Harold Fowler
Circular slide rule, Fowler "Magnum" long-scale calculator.
Fitted case for circular slide rule, Fowler "Magnum" long-scale calculator.