A German fruitwood diptych dial with three coloured print faces, the lid with the name and latitudes of 54 towns, the inner lid with sundial missing string gnomon, the third face with compass rose, (misssing needle and glass and pin gnomon) - 4.in. wide late 18th Century

細節
A German fruitwood diptych dial with three coloured print faces, the lid with the name and latitudes of 54 towns, the inner lid with sundial missing string gnomon, the third face with compass rose, (misssing needle and glass and pin gnomon) - 4.in. wide late 18th Century