Check the listing for details. Alidade Aluminium Dumpy/Auto Level Optical Transit Surveying Instrument with Box. Condition: New. Listed at 140.62 USD. Description: Alidade Brass Dumpy/Auto Level Optical Transit Surveying Instrument with BoxDumpy 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.Product Features Material : Brass, Aluminium & GlassWeight : 1.870 kg ApproxSize : 10.2 x 4 x 6 inch, 26 x 10.2 x 15.2 cm Approx32x magnification allowing for 360' of working range Look Photos For Actual Image Of Product. All Work is Hand Made.