'Sitesquare' optical square, British, 1959
- maker:
- Hilger and Watts Limited
This image is released under a CC BY-NC-SA 4.0
Licence
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© 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
