A late 18th Century French brass "Butterfield"-type dial signed N.BION A PARIS, the horizontal plate engraved for the latitudes 40°,45°,50°,and 55° with compass and spring loaded bird gnomon, the underside engraved with the names and latitudes of 23 continental cities and towns - 3.in.(7.6cm)long; a brass cased pocket compass with coloured paper card; and a wood diptych dial (3)