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Road tracer type level with target, British, 1923-1927

Road tracer type level with target, British, 1923-1927

1923-1927
Acetylene signal lamp with heliograph attachment used for geodetic surveying in Uganda

Acetylene signal lamp with heliograph attachment used for geodetic surveying in Uganda

1907
Levelling staff, British, 1920-1922

Levelling staff, British, 1920-1922

1920-1922
Mark II Cotton-Type Range Finder

Mark II Cotton-Type Range Finder

1960-1965
Part of levelling staff, British, 1915-1922

Part of levelling staff, British, 1915-1922

1915-1922
Met Office Mk B type balloon theodolite, 1919

Met Office Mk B type balloon theodolite, 1919

1919
14" Canadian Pattern Y-level

14" Canadian Pattern Y-level

1920
Levelling staff, British, 1920-1922

Levelling staff, British, 1920-1922

1920-1922
Wade type spirit level, British, 1924

Wade type spirit level, British, 1924

1924
Levelling staff, British, 1920-1922

Levelling staff, British, 1920-1922

1920-1922
Part of sectioned micrometer transit theodolite, 1926

Part of sectioned micrometer transit theodolite, 1926

1926
Case for Brunton pocket transit compass, British, 1918-1922

Case for Brunton pocket transit compass, British, 1918-1922

1918-1922
Brunton pocket transit compass, British, 1918-1922

Brunton pocket transit compass, British, 1918-1922

1918-1922
Stand for Brunton pocket transit compass, British, 1918-1922

Stand for Brunton pocket transit compass, British, 1918-1922

1918-1922
Rubber tube from acetylene signal lamp with heliograph attachment used for geodetic surveying in Uganda

Rubber tube from acetylene signal lamp with heliograph attachment used for geodetic surveying in Uganda

1907
Diaphragm from acetylene signal lamp with heliograph attachment used for geodetic surveying in Uganda

Diaphragm from acetylene signal lamp with heliograph attachment used for geodetic surveying in Uganda

1907
Diaphragm from acetylene signal lamp with heliograph attachment used for geodetic surveying in Uganda

Diaphragm from acetylene signal lamp with heliograph attachment used for geodetic surveying in Uganda

1907
Lamp barrel of acetylene signal lamp with heliograph attachment used for geodetic surveying in Uganda

Lamp barrel of acetylene signal lamp with heliograph attachment used for geodetic surveying in Uganda

1907
Case for vertical force magnetometer and recording apparatus

Case for vertical force magnetometer and recording apparatus

1935
Case for sectioned micrometer transit theodolite, 1926

Case for sectioned micrometer transit theodolite, 1926

1926
Tube wrench from acetylene signal lamp with heliograph attachment used for geodetic surveying in Uganda

Tube wrench from acetylene signal lamp with heliograph attachment used for geodetic surveying in Uganda

1907
Mixing cylinder from acetylene signal lamp with heliograph attachment used for geodetic surveying in Uganda

Mixing cylinder from acetylene signal lamp with heliograph attachment used for geodetic surveying in Uganda

1907
Gas generator from acetylene signal lamp with heliograph attachment used for geodetic surveying in Uganda

Gas generator from acetylene signal lamp with heliograph attachment used for geodetic surveying in Uganda

1907
Balloon theodolite MkII by E.R. Watts and Son

Balloon theodolite MkII by E.R. Watts and Son

1943
Balloon theodolite by E.R. Watts & Son

Balloon theodolite by E.R. Watts & Son

1917
Combined optical square & hand level, British, 1920-1926

Combined optical square & hand level, British, 1920-1926

1920-1926
Plotting rule by E.R. Watts & Son London

Plotting rule by E.R. Watts & Son London

1920-1940
Balloon theodolite by E.R. Watts & Son

Balloon theodolite by E.R. Watts & Son

1940
Rangefinder, Cotton type Mk.11

Rangefinder, Cotton type Mk.11

Glass scale division demonstration, British, 1919-1922

Glass scale division demonstration, British, 1919-1922

1918-1922
Brunton pocket transit compass by E.R. Watts, London, England, 1918-1922. Comprising case, compass and stand. (see stroke (and part) records)

Brunton pocket transit compass with case, British, 1918-1922

1918-1922
Micrometer transit theodolite (sectioned), 3.5-inch, in clear plastic display case, and storage box by E. R. Watts & Son, London, England, 1926.

Sectioned micrometer transit theodolite, 1926

1926
Three specimens of graduated scales for levelling staves by E.R. Watts and Son, c 1920

Three levelling staves, British, 1920-1922

1920-1922
Road tracer type surveying level and target, Ceylon pattern, by E.R. Watts and Son, London, England, 1923-1927

Road tracer type level with target, British, 1923-1927

1923-1927
Early Lens Grinding Machine by E.R. Watts & Son, London, England, c.1900.

Early Lens Grinding Machine by E.R. Watts & Son

1895-1905