Hines' 'Patent Weight and Quantity Calculator', c.1908.
Mechanical ready reckoner patented by J. Hine, 1905
Mechanical ready reckoner patented by Patented by James Hines. This form of calculator gave costs of various quantities of goods at various prices per pound, hundredweight or ton. The quantity was set by turning the apropriate wheel at the side, and the price per unit by using the keys. The cost would then show in the apropriate window.
- Object Number:
- brass (copper, zinc alloy), ebony, glass, metal (unknown), paper (fibre product) and wood (unidentified)
- Delehar Antiques
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