Kramer's dilating aural speculum

1801-1900

Dilating nasal speculum

1850-1880

Kramer's aural speculum

1860-1900

Pilcher's dilating nasal speculum

1870-1910

Pilcher's nasal speculum

1864-1910

Kramer's aural speculum

1885-1896

Kramer's dilating aural speculum

1750-1850

Kramer's dilating aural speculum

1870-1901

Kramer's aural speculum

1850-1900

Dale-Schuster pump

1927-1935

Dale-Schuster pump

1927-1935