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Non-Commercial Use
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Category
Electronic Components
1
Meteorology
1
Maker
E. R. Watts & Son
1
E.R. Watts and Son
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Object type
plotting rule
2
Place
London
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London, Greater London, England, United Kingdom
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brass
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wood
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Plotting rule by E.R. Watts & Son London
1920-1940
Plotting Rule used for manual position calculations with Chain-Home Radar
1939-1951
