Ear-plate from monaural stethoscope
1831-1910
Wormull's monaural stethoscope
King's monaural stethoscope
Monaural stethoscope
Monaural stethoscope
Portable monaural stethoscope, by Maw, English
King's monaural stethosope
Portable monaural stethoscope
1890
King's monaural stethoscope
Quain's monaural stethoscope
1841-1898
Portable monaural stethoscope
King's monaural stethoscope
1890
Hare's monaural stethoscope, English(?), 1851-1910
1851-1910