Sundial and compass with perpetual calendar and lunar circles. Brass, part silvered, 6 1/8 x 5 3/8-inches. By Christopher Kohler, Dresden, Germany, 1677. Glass of compass box cracked, compass needle ...

This is a horizontal compass sundial, made of gilded silver. It is of 'Butterfield' type, named after English manufacturer Michael Butterfield, who popularised the adjustable bird gnomon.

the pointy component of a sundial that casts a shadow when hit with sunlight. Concentric rings and radial lines were carved into the three discs, further demonstrating the semblance of a compass.