Four butt-joint plates, used with 'Sketcher boardto update Maps, unsigned, British, 1950-1959 Butt-joint plates for plane table, British, 1950-1959 1950-1959
'Sketcher' plane table board, to carry butt-joint plates for updating the survey in the field, unsigned, British, 1950-1959 'Sketcher' plane table board, British, 1950-1959 1950-1959
Johnson type plane table outfit for comparatively high precision work, by W. and L.E. Gurley, Troy, New York, USA, 1914 Johnson type plane table outfit, 1914 1914
Plane table, unsigned, British, with tripod, and rope brace, 1980-1985. Length (tripod leg) 1200 mm. Width ( plane table) 560 mm Plane table, 1980-1985 1980-1985