Standard 6" diagonal scale in case; brass 6 7/8" x 3 7/16" screwed by 4 screws to mahogany base with a mahogany cover

Made:
London
maker:
John Bird
Standard 6 diagonal scale in case; brass 6 7/8' x 3 7/16'

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Standard 6 diagonal scale in case; brass 6 7/8' x 3 7/16'
Science Museum Group
© The Board of Trustees of the Science Museum

Standard 6" diagonal scale in case; brass 6 7/8" x 3 7/16" screwed by 4 screws to mahogany base with a mahogany cover, overall size with cover on is 7 7/8" x 4 1/8" x 7/8", diagonal scale gives thousandths, engraved "John Bird London"

Details

Category:
Mathematics
Object Number:
1911-184
Materials:
base & cover, mahogany and scale, brass
type:
drawing instruments and diagonal scales
credit:
J.C. Stevens Auction House