Hand air speed indicator with 8 vanes, unsigned, m

Made:
1900-1930 in United Kingdom
maker:
Negretti and Zambra

Hand air speed indicator with 8 vanes, unsigned, marked "zero-setting pat no.33729", No G 6538, and "Made in Gt Britain". Date 1900-1930. Probably by Negretti & Zambra

Details

Category:
Meteorology
Object Number:
1995-882
Materials:
aluminium and brass
Measurements:
frame: 4.1 x 10.5 cm
type:
air speed indicator
credit:
Meteorological Office, Berkshire

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