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The BBC is not responsible for the content of any external sites referenced. An interview in 1987 with Curt, by the Charles Babbage Institute at the University of Minnesota, touches upon the early days of calcuators and the disruption of the World Wars I and II.Most of the content on A History of the World is created by the contributors, who are the museums and members of the public.The views expressed are theirs and unless specifically stated are not those of the BBC or the British Museum.This set of Vigor watchmaker's screwdrivers is imported from France. Inside the bottom Once the two screws are removed, the bottom cover comes free and you can look inside.The hand-cranked Curta was popular with sports car rallyists even after electronic calculators were available. There are several beautiful animations on the web, and a registry of current owners.
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It was, in fact, the best portable mechinical calculator to be invented and is an example of the extreem refinement of mechanical engineering before electronics took over.
It is a lovely object to look at, to hold and to use.
Along the side are a number of vertical sliders which allow you to set the digits of one of your numbers, which are shown just above the sliders.
On the top face, along the outside, are shown two registers.
The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.