Wooden box with brass top and 24 knobs (22 larger and 2 smaller) on the right-hand side. In addition there are two extra knobs on the right side of the top, as well as two removable oval access panels with handles on each of the ends.Stamped on top of box: a coat of arms 'HARTMANN OF BRAUN A/M' 'RICHTIG BEI / 20 / GRAD CELSIUS' increments for measurement On front side: Sticker labelled 'NATURAL PHILOSOPHY LABORATORY / NO 7 / UNIVERSITY OF MELBOURNE' Stamped on end of metal top: 'No. 2665'hartmann of braun, resitance decade box, resistance box, electical instruments, frankfurt, natural philosophy laboratory