This surveyor's transit level or Theodolite was made sometime in the late 19th century by Joseph Halden and Company based in Manchester and is marked with the maker's name on the compass.
After being in partnership with A.G. Thornton from 1878 at 8 Albert Square, Manchester, Joseph Halden set up his own firm at the same address when Thornton left. The firm were important manufacturers of both drawing and surveying instruments and had works at various addresses around Manchester with branches in many other cities. They were taken over by the Ozalid group in 1969.
A great looking piece with the original mahogany case.
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