|based in||U S A|
|horn dia||285x234 mm|
|marks||The American Dentaphone Co Cincinnati,O Patd Mar9th 1880|
|found in||Brooklyn NY|
|seller note||I consider the Dentaphone, if not the Holy Grail of hearing aids, then certainly a piece of the True Cross--realizing that neither of these is usually found mint and boxed with instructions|
|comment||Very rare item in pristine condition and with its box. I have one, WMU has one, I understand Phisick has one. The Hearing Aid Museum has TWO!|
Deaf 3rd Reich has one - any more ?
The little pin is to secure the cord when the plates are bent in use. The hinges are good as new. I have the original instruction sheets too