Cammann type binaural stethoscope
1845-1855
1845-1855
1889
1970
1925-1945
1866-1900
1991
Unknown
1920-1950
1940 -1950
1914-1918
Unknown
1891-1920
1920-1950
Unknown
2020-2021
1920-1950
1941-1950
1880-1930
Unknown
1920-1950
1800-1870
1920-1950
1900-1940
2020
1880-1920
circa 2020
1880-1930
1860-1920
1920-1950
1880-1920
1999
1880-1930
1874-1920
1851-1910
1890-1940
1920-1950
1851-1910
1836-1930
circa 2020
1880-1920
1890-1940
1880-1930
1910-1945
1860-1920
1940-1965
1880-1910
1801-1900
2020