Ear piece from Haydn Brown's binaural stethoscope
1871-1930
Binaural stethescope, by Hawksley, English, c1920
1910-1930
Binaural stethoscope
Binaural stethoscope
Binaural stethoscope
1861-1920
Ear piece from binaural stethoscope
1841-1940
Ear piece from binaural stethoscope
1851-1910