Product Features:

Dumpy level are still used today for ultra high precision optical alignment and measurement its also called as the builders auto level.
A dumpy level, builder's auto level, leveling instrument, or automatic level is an optical instrument used to establish or verify points in the same horizontal plane. It is used in surveying and building with a vertical staff to measure height differences and to transfer, measure and set heights Dumpy level is an optical surveying leveling instrument consisting a telescope tube firmly secured in two collars fixed by adjusting screws to the stage by the vertical spindle. The telescope can rotate only in a horizontal plane. Relative elevation of different points of a surveying land is determined with dumpy level. The telescope can rotate only in a horizontal plane.