Cylinder dial, circa 1880
On application
A boxwood cylinder dial (also known as a shepherd or pillar dial). It is a portable, altitude dial in which hour lines for different dates are delineated around the surface of a cylinder, which is allowed to hang or stand vertically. A horizontal gnomon projects radially from the top of the cylinder, and is adjusted to the appropriate date around its periphery. 9,5 cm high, diameter 2cm