Concept
Hearing Aids
Catalogue
- Archives and manuscripts
M0013745: Ear trumpet, 19th century
Date: October 1954
- Archives and manuscripts
M0013743: Double ear trumpet with headband
Date: October 1954- Archives and manuscripts
M0013746: Pair of miniature ear-trumpets, 19th century
Date: October 1954
- Archives and manuscripts
M0013744: Speaking or conversation tube, 19th century
Date: October 1954