Theodolite prism targets, Wild model GDF-22, for use with TC-1 theodolite, incomplete set, cased, by Wild Heerbrugg A.G., Switzerland, c1980, ex British Rail (North Eastern), Civil Engineer's Office, York.
Theodolite prism targets, Wild model GDF-22, for use with TC-1 theodolite, incomplete set, cased, by Wild Heerbrugg A.G., Switzerland, c1980, ex British Rail (North Eastern), Civil Engineer's Office, York.
