Johann Martin (1642-1721) Equinox sundial Octagonal silver plate incorporating a brass compass; brass latitude arc graduated from 20° to 90°. Signed Johann Martin in Augspurg 48°. H. 5 cm - W. 4.5 cm Germany, Augsburg, first third of the 18th century. (bow and equatorial ring detached, compass needle later, glass damaged) Also included: Silver sundial signed Choisy Paris, in case. France, probably 18th century H. 5.5 cm - L. 4 cm (later compass, gnomon missing) Two glasses, set of gnomon fragments.