3V, Battery. Timer operates on both 1.5 and 3VD-batteries, thus giving two different motor speeds, when required. The whole assembly is mounted on a flat base to reduce vibration & increase stability. Complete with carbon discs and tickertape. Optional stand no. 1819 for use with tape roll.
AC, low Voltage, Operates on 6-12V AC. Relative positions of tape and carbon discs can be adjusted for optimum use of carbon discs. Assembly mounted on metal base, providing stability.AC Mains. Operates on AC. Mains, thus eliminating the use of a power supply or transformer. Mounted on a wall-finished, wooden base that can be mounted on a vertical or horizontal rod.