Pilcher's nasal speculum
1864-1910
Pilcher's dilating nasal speculum
1870-1910
Kramer's dilating aural speculum
1801-1900
Kramer's aural speculum
1860-1900
Dilating nasal speculum
1850-1880
Kramer's dilating aural speculum
1750-1850
Kramer's aural speculum
1885-1896
Kramer's aural speculum
1850-1900
Kramer's dilating aural speculum
1870-1901
Dale-Schuster pump
1927-1935
Dale-Schuster pump
1927-1935