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
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
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