
Cammann type binaural stethoscope
1845-1855
1845-1855
1884-1900
1880-1920
1903
1870
1840-1900
1895-1905
1851-1900
1801-1840 (original); 1901 (model)
1873
1879-1896
1890-1900
1846
1890-1891
1862
1888
1880-1900
1862-1863
circa 1925
1873
1831-1870
1830-1900
1911
circa 1920
1889
1898
1899
1880-1920
1850-1856
1850-1859
1901
1845
1851
1904
1879
1850-1859
1910
1915
1895
1920
1865
1915
1924
1910
1882
1849
1855
1910-1920
1846-1859
1840