'Sitesquare' optical square, British, 1959

Made:
1959 in Debden
maker:
Hilger and Watts Limited
'Sitesquare' optical square for laying out right angles

Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

'Sitesquare' optical square for laying out right angles
Science Museum Group
© The Board of Trustees of the Science Museum

'Sitesquare' optical square for laying out right angles, by Hilger & Watts Ltd, Debden, London, Essex, England,1959

Details

Category:
Surveying
Object Number:
1959-260
Materials:
steel (metal), paint, brass (copper, zinc alloy), glass, spirit and cardboard
Measurements:
overall: 135 mm x 75 mm x 80 mm, .71kg
type:
optical square
credit:
The Rank Group Plc