Compass and sundial - Hemisferium
Reproduction of a "Diptych" sundial or pocket sundial inspired by the famous Bavarian astronomer, Johannes Kepler.
Quadrants with a compass, introduced in the 15th century, were the first portable sundials. The compass served to face the quadrant toward the north and the gnomon (a bit of cord or a flexible triangle) could be raised or lowered to accommodate the latitude where the compass is used.
This model has a compass rose in the upper part with a needle to determine the 32 rumbs (angle measurement units, equal to 11.25°, delimited by wind directions).
The golden age of sundials lasted from the 15th century to the end of the 18th.
Supplied with an explanatory booklet.