Turned bone case with small brass equatorial sundial in upper section, engraved gnomon and chapter ring, glazed compass with colored paper windrose, middle section with brass lunar dial, engraved date and chapter rings, central rotating disc with recess for the moon phase, removable threaded base, with compartment for tobacco or small parts, magnetic needle loose, case with stress crack, Ø 1 ½ in., height 2 ½ in.品相: (3/3)