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Elliptical receptor or artificial hand, ca. 1875
Elliptical receptor or artificial hand, ca. 1875
Black ear trumpet, 19th century
Black ear trumpet, 19th century
Super-ear, ca. 1926
Super-ear, ca. 1926
Small ear trumpet, 19th century
Small ear trumpet, 19th century
Aurolese phone floral tube, ca. 1810
Aurolese phone floral tube, ca. 1810
Super-Ear, ca. 1929
Super-Ear, ca. 1929
Aurolese phones, 1830
Aurolese phones, 1830
Dr. William's pattern ear trumpet, 19th century
Dr. William's pattern ear trumpet, 19th century
Double parabolic ear trumpet, 19th century
Double parabolic ear trumpet, 19th century
Double parabolic ear trumpet, 19th century
Double parabolic ear trumpet, 19th century
Telescoping ear trumpet, 19th century
Telescoping ear trumpet, 19th century
Telescoping ear trumpet, 19th century
Telescoping ear trumpet, 19th century
Pressed board ear trumpet, 19th century
Pressed board ear trumpet, 19th century
Pressed board telescoping ear trumpet, 19th century
Pressed board telescoping ear trumpet, 19th century
Tragus-like ear trumpet, 19th century
Tragus-like ear trumpet, 19th century
Burkhardt-Merian's tragus-like trumpet, 19th century
Burkhardt-Merian's tragus-like trumpet, 19th century
Elliptical opening trumpet, ca. 1875
Elliptical opening trumpet, ca. 1875
Small Ear trumpet
Small Ear trumpet
Miniature ear trumpet, 19th century
Miniature ear trumpet, 19th century
Audi-Ear, ca. 1925
Audi-Ear, ca. 1925
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