Uploaded September 2018 | Updated September 2026, 1 hour ago

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The British Calculator, or BriCal, is a simple adding machine for British currency. It was invented by Herbert and Mabel Dickinson in 1905. This one was made in about 1907 by T.J. Marshall & Co.

For more on this and other mechanical calculators, visit my website:
jaapsch.net/mechcalc

0:00 Introduction
0:32 History
2:12 Addition
3:08 Clearing
4:02 Further history
4:30 Opening the case
5:35 Mechanism
7:28 More history
8:22 Outro