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21286 results with digital objects Show results with digital objects

Hair receptor, 19th century
Hair receptor, 19th century
Sonotone Professional table set, Model 50, ca. 1949
Sonotone Professional table set, Model 50, ca. 1949
Larm apparatus, 1908
Larm apparatus, 1908
Conversation tube, ca. 1860
Conversation tube, ca. 1860
Simplex Hearing Tube, ca. 1920
Simplex Hearing Tube, ca. 1920
Rubber conversation tube, 19th century
Rubber conversation tube, 19th century
Flexible conversation tube, 19th century
Flexible conversation tube, 19th century
Tuning forks
Tuning forks
Circular receptor hearing device, ca. 1875
Circular receptor hearing device, ca. 1875
Bilateral circular receptor, 19th century
Bilateral circular receptor, 19th century
Stethoscope tube, ca. 1840
Stethoscope tube, ca. 1840
Black metal conversation tube, 19th century
Black metal conversation tube, 19th century
Open ball receptor, 19th century
Open ball receptor, 19th century
Itchin model adjustable resonator hearing device, ca. 1875
Itchin model adjustable resonator hearing device, ca. 1875
Closed ball resonator hearing device, ca. 1875
Closed ball resonator hearing device, ca. 1875
Conversation tube with pipe-shaped receptor, 19th century
Conversation tube with pipe-shaped receptor, 19th century
Rubber conversation tube, 19th century
Rubber conversation tube, 19th century
Rubber conversation tube, 19th century
Rubber conversation tube, 19th century
Mysterious two-headed aid, 189-
Mysterious two-headed aid, 189-
Marshall's Collector ear trumpet, 19th century
Marshall's Collector ear trumpet, 19th century
Results 61 to 80 of 21286