One of four ready reckoners
- PART OF:
- Selection of four ready reckoners
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Science Museum Group
© The Board of Trustees of the Science Museum
One of four ready reckoners, for assisting the conversion from L.s.d. to decimal currency and from imperial to metric measures. A rectangular plastic dial with optical display, namely two sets of figures available depending upon the viewing angle.
Details
- Category:
- Mathematics
- Object Number:
- 1976-430/3
- Measurements:
-
overall (estimate): 2 x 80 x 150 mm
- credit:
- Science Museum (Great Britain)
