Monaural stethoscope
1851-1910
Monaural stethoscope
1831-1900
Monaural stethoscope
1831-1900
Monaural stethoscope
1830
Burrow's monaural stethoscope
1831-1905
Portable monaural stethoscope, Europe, 1860-1890
1860-1890
Monaural stethoscope
1850-1860
Ear plate from monaural stethoscope
1801-1910
Monaural stethscope, English(?), 1851-1910
1851-1910
Ear plate from monaural stethoscope
1851-1910
Monaural stethoscope
1840