Ready reckoner 'Prompt' calculator, 19th century.
- c.1863 in France
Ready reckoner "Prompt" calculator invented by Am. Maurand for converting between British Imperial Measure and the French Metric System, French, 19th century.
- Object Number:
- Permanent collection
Cite this page
We encourage the use and reuse of our collection data.
Data in the title, made, maker and details fields are released under Creative Commons Zero
Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence
Download catalogue entry as json
Download manifest IIIF
Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.