Beringer's Quadrant Sundial
This model is a reproduction of a mobile cubic quadrant that dates back to 1736, and is thought to be the invention of David Beringer of Hapsburg (Germany).
It is made up of an articulated arm, which allows us to incline the cube in a North-South direction, and a plumb line on the eastern side that moves along a graduated scale and can be used to adapt the instrument to the latitude of the mesaure.
Historical Reference: Cube Polyhedral Dial by David Beringer and G.P. Seyfreid, German c. 1730-40