Cammann type binaural stethoscope
1845-1855
1845-1855
1920-1935
1915
1878-1900
2020
2020
1939
1939
1970-1975
1970-1975
2005
1920-1930
1880-1900
1939-1947
1949
1980s
1960-1963
1928
1930-1960
1935-1945
1906
1882
1885-1900
1889
1969
2020
1947
1920-1930
1935-1945
1930-1960
1954
1969
1995
1900-1930
1968
1920s
1969-2000
1924-1928
1995
circa 1928
1934
1880-1910
1964
1944
1945-1955
1901-1925
1998
2013