Binaural stethoscope
Wormull's monaural stethoscope
Portable monaural stethoscope, by Maw, English
Quain's monaural stethoscope
1841-1898
Quain's monaural stethoscope
1841-1898
Chest piece from binaural stethoscope
1861-1920
Portable monaural stethoscope
1890
Portable monaural stethoscope
Quains monaural stethoscope, English, 1851-1898
1851-1898