
Aesthesiometer, Sieveking, brass and nickel
1856-1900
1856-1900
1900
1900-1945
circa 1886
1885-1889
circa 1886
circa 1886
1900-1906
1900-1945
1900-1945
1900-1945
1900-1906
1901-1910
1900-1945
1918-1925
1915
circa 1886
1904
circa 1886
1909-1919
1886