
Cammann type binaural stethoscope
1845-1855
1845-1855
1821
1771-1860
1870
1801-1840 (original); 1901 (model)
1690
1675-1679
1873
1846
1862
1862-1863
1873
1831-1870
1806
1748-1763
1850-1856
1850-1859
1845
1851
1879
1850-1859
1865
1793-1803
1849
1855
1846-1859
1840
1875
1842
1853
1850
1837
1794
1837
1877
1870
1837
1820
1782
1822-1840
1866-1870
circa 1854
1850
1878
1787
circa 1854
1803-1828
1764
1870-1875
circa 1840