Zenith Vocalizer III, 1972
Zenith Model 75, 1947
Tonemaster Minuet, ca. 1948
Beltone Triumph 6 Super, ca. 1961
Maico model F (Quiet Ear), 1949
Western Electric Model 134, ca. 1945
Zenith A2A Radionic, ca. 1942
Paravox Model YM Veri-Small, 1948
Akustik Silver Type CX, ca. 1931
Small ear trumpet, 19th century
Double parabolic ear trumpet, 19th century
Miniature ear trumpet, 19th century
Miniature ear trumpet, 19th century
Otophone, ca. 1895
Audi-Ear, ca. 1925
Pressed board telescoping ear trumpet, 19th century
Telescoping ear trumpet, 19th century
Dr. William's pattern ear trumpet, 19th century
Aurolese phone floral tube, ca. 1810
Small ear trumpet, 19th century
