Twin-beam portable electrocardiograph machine, 2-channel, in wooden carrying case, by Sanborn Company, U.S.A., 1935-1955, with supply of recording paper by Ilford, 1970-1979
Twenty boxes of Metagraph recording paper, 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Box of Metagraph recording paper, one of twenty, with 155 charts, Sanborn Company, United States, from twin-beam portable electrocardiograph machine, Sanborn Company, United States, 1935-1955
Thrity-five boxes of recording paper, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
Box of recording paper, one of thirty-five, by Ilford Limited, Ilford, Essex, England, 1970-1979, from twin-beam portable electrocardiograph machine, by Sanborn Company, United States, 1935-1955
