Notelaren box with brass fittings. Double lid with sight glass. On upper lid brass plate marked 'Amerique' and lozenge-shaped plate marked 'N 3202'.
On inside of lid adhesive label marked: 'Nettoyé, arrangé et reglé en Fevrier et Mars 1889 par M. Eug. Mauler de Neufchatel juin 97 3 ch af'. With regulation certificate from the Royal Observatory of Belgium, 1912.
