Kerr Stethoscope

The Kerr Symballophone c. 1940 used two diaphragm chestpieces similar to the bowles chest pieces. Sounds from either chest piece could be heard in both ears so that the examiner could compare sounds emanating from differnt parts of the chest. Note the metal chest pieces and close-up of the double-looping tube connections of the binaural earpieces, such that each ear could hear the sound from either chestpiece. The leather case contained this Symballophone. The stethoscope was used by Dr. Willaim Faulkner (1896-1976), a thorarcic surgeon who was at UCSF during the tenure of Dr. Kerr's leadership of the UCSF Department of Medicine.