Aural speculum of narrow aperture
Aural speculum of narrow aperture
Auriscope, by Gowllands Ltd., with light bulb, and three aural specula, in case, British c1957
Aural speculum of narrow aperture
Aural speculum of broad aperture
Battery powdered light bulb to fit inside auriscope
Auroscope eyepiece with light sourse and magnifying glass
Aural speculum with narrow aperture