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First Order bench mark

Angle iron to support levelling staff at bench mark

1914

Mine surveying sighting disc, German, 1920-1930

1920-1930

Bronze bench mark, Canadian, 1920-1922

1920-1922

Nameplate for bench mark, British, 1914

1914

Bronze bench mark, American,1914

1914

Second Order bench mark, Survey of Egypt, c. 1920

Bolt forming upper reference point on top of granite pillar at fundamental bench mark

Bolt forming one concealed reference point at a fundamental bench mark

Mining surveying level target, British,1930

1930

Traverse mark, bolt and cover, British, 1910-1914

1910-1914

Iron bracket for use with Bench mark, British, 1914

1914

Cast iron bench mark, French, 1914

1914

Cast iron bench mark, French, 1910-1914

1910-1914
Bench mark and bracket for surveying staff, used in taking height information

Bench mark and bracket for surveying staff

1970-1975
Adjustable stave support with spirit level for use with secondary bench mark, 1914. With brass cannister

Bracket for use with level on bench mark, British, 1914

1914