Two draw leveling staff made by A. G. Thornton Ltd, Manchester. Two draw leveling staff made by A. G. Thornton Ltd circa 1910-circa 1930
Precise levelling staff by Cooke, Troughton & Simms Ltd, York, England, as new condition, c. 1975 Levelling staff, British, 1971-1980 1971-1980
Three specimens of graduated scales for levelling staves by E.R. Watts and Son, c 1920 Three levelling staves, British, 1920-1922 1920-1922
Sectioning surveying alidade with levelling staffs, staff, level and cases, serial No.20654 by Carl Zeiss Jena, Germany (supplied by Carl Zeiss (London) Ltd.), 1925-1935 Sectioning alidade, with scales, staff, level and cases, 1925-1929 1925-1929