FRANCE BUTTERFIELD, à Paris. Horizontal sundial, portable. Octagonal silver plate (950) with indexes engraved with Roman and Arabic numerals, with compass and triangular style, tilting, with birds, folding, on cut spring blade engraved with leaves. Signed. On the reverse, the names and latitudes of thirty European cities. Late 17th or early 18th century. H. (unfolded) : 3,3 cm - Dim. plate : 6,5 x 5,6 cm - Gross weight : 37 g. Wear and minor oxidation, notably on the compass needle; play in the gnomon spring. Michael Butterfield (1635-1724), of English origin, worked in France from 1677.