'Sitesquare' optical square, British, 1959

Made:: 1959 in Debden

maker:: Hilger and Watts Limited

'Sitesquare' optical square for laying out right angles

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'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

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'Sitesquare' optical square, British, 1959

Details

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