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More on adding and subtracting with the 1950s Brunsviga 13RK mechanical calculating machine

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This page is part of the manufacturer's instruction book for the Brunsviga 13RK mechanical calculating machine. It continues the basic instructions on subtraction and goes on to explain more on addition and subtraction.

Page from the instruction book for the 1950s Brunsviga 13RK mechanical calculating machine
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This website Join me in the 1900s is a contribution to the social history of everyday life in 20th century Britain from the early 1900s to about 1960, seen through personal recollections and illustrations, with the emphasis on what it was like to live in those times.