France Horizontal sundial, portable, of the "Butterfield" type. Octagonal brass plate with engraved indexes with Roman and Arabic numerals, with compass and triangular tilting style, with birds, folding, on spring blade. Unsigned. On the reverse side, the names and latitudes of nineteen European cities, mostly French. Second half of the 18th century. H. (unfolded) : 3.9 cm - Dim. plate : 7.5 x 6.5 cm. Patina of use, some stains.