early 18th century, German, Ausburg type octagonal dial with central compass, cardinal points marked in Latin initials engraved arrow indicating magnetic variation 15 degrees west of north, silver latitude arc divided 0 - 90 degrees subdivided to two degrees, silver and gilt-brass hour ring 3-12, 1-9 divided to 5 minutes, strut supporting rod gnomon, reverse of dial plate engraved Johann Willebrand in Augburg, compass base engraved with list of latitudes, Lisbona Corfu 39, Napoli 41, Rome 42, Niss 44,  Belgrad Mayland Venidig Lion 45, Wien Strasburg Salsb Munchen 48, Paris Regisburg Nurnb Heidelburg 49, Prag Wurtzburd Frankfurt Main Trier Russel 50, Callin Brusel Breslau Gend Antwerpen Dresden Leitzig 51, Berlin Amsterda Londen 52, Hamb Danzig 54, Coppeh 56, Stockholm 60, in fitted silk-lined Morrocco leather case, dial plate 5.4cm