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"Brical", The British Calculator

Currency:USD Category:Antiques / Science & Medicine (Pre-1930) Start Price:10.00 USD Estimated At:100.00 - 150.00 USD
 Brical , The British Calculator
with leather case and instructions. " Patented by H and M Dickinson [1905], the 'Brical' was Britain's answer to the French circular 'Tronset' instrument and is a modification of it. It was designed to add sums of money from 1/2d to £500.Diameter approx. 5.25"