Equatorial sundial with compass Silver and brass, engraved. Octagonal body with recessed compass, surrounded by engraved floral decoration. On it the pole elevations of Prague and Berlin and the sign "Johann Martin in Augsburg 48". He lived from 1642 to 1721. Verso a compass box with engraved information on over 20 cities, from Rome to Stockholm. Hinged hour ring and degree arch. D. 5 cm. Cf. Dirk Syndram, Wissenschaftliche Instrumente und Sonnenuhren, no. 77, p. 167. Provenance: Dissolution of an important German private collection - Part II. A German silver and brass pocket sundial by Johann Martin (1642 - 1721). Signed. Augsburg. 17th/18th century.