A dentist's electric air compressor unit complete with a tubular cover. The compressor is designed to sit upright and has a belt attached to three pulleys on the left facing side of the unit. Two manufacturer's name plates listing the manufacturer, oiling instructions and specifications of the motor are screwed to the unit. "RDMCO" are written in interlocking letters on one side of the compressor. "AUTOMATIC SWITCH/BRITISH PATENT/16130 of 1914" is written around this. A small, rectangular piece of cracked rubber with a hole at the centre sits on top of the cover. An air outlet valve is positioned on the right facing side of the base and a power cord is attached to the left facing side of the compressor.
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