MICHAEL BUTTERFIELD (1635-1724) Two horizontal brass portable sundials brass, the octagonal plate with four hour divisions signed "Butterfield à Paris", gnomon with bird, the back engraved with latitudes of European cities, the compass with four directions. Late 17th century. Height: 7 and 6.5 cm - Width: 6 and 6.5 cm. One in its case. (missing and damaged)