Scale of shades for automatic filter

Made:
London
maker:
Casella
Scale of shades for automatic filter, by Casella, London

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Scale of shades for automatic filter, by Casella, London
Science Museum Group
© The Board of Trustees of the Science Museum

Scale of shades for automatic filter, by Casella, London

Details

Category:
Meteorology
Object Number:
1995-843
Materials:
wood and paper
Measurements:
overall: 22.8 x 8.2 cm
type:
scale
credit:
Meteorological Office, Berkshire