Combined optical square & hand level, British, 1920-1926
- maker:
- E. R. Watts & Son
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© The Board of Trustees of the Science Museum
Combined optical square and hand level, by E. R. Watts & Son, London, England, 1920-1926, patented 1920.
Details
- Category:
- Surveying
- Object Number:
- 1939-222
- Materials:
- brass (copper, zinc alloy), steel (metal), textile, leatherette, felt and cardboard
- Measurements:
-
overall: 65 mm 52 mm, .16kg
- type:
- optical square and plummet level
- credit:
- E. R. Watts & Son
