30-hour weight driven movement with spring driven grande sonnerie striking on two gongs, rosewood inlaid case.
16.5-cm enamel dial with Roman numerals signed Leonard Müller in Josefstadt, fine blued pierced matching hands and ormolu loral bezel, 30-hour weight driven movement with Graham deadbeat and pendulum with wood rod and brass bob, spring driven grande sonnerie striking on two gongs, rosewood case with architectural moulded pediment, throughout with inlaid banding, front door and sides with glass panels, concave sided base with adjustment screws.