Small black metal box holds battery-operated early 1970's telephone transmitter; with mouth ground made by Canadian company Paramedic Instrumentation in Vancouver; last patient's appointment card and sample ECG chart is included; batteries still in box, can't remove Feb 9/94
Small black metal box holds battery-operated early 1970's telephone transmitter; with mouth ground made by Canadian company Paramedic Instrumentation in Vancouver; last patient's appointment card and sample ECG chart is included; batteries still in box, can't remove Feb 9/94