Found this very early carbon hearing aid. I decided to test it with an ailing 9V battery and to my surprise it worked very well!
Price: $0.99
Fire Jet Torture
(as of June 3, 2020 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Price: $25.99
M. O. Dantzler, Petitioner, v. Dictograph Products, Inc. U.S. Supreme Court Transcript of Record with Supporting Pleadings
(as of June 3, 2020 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Price:
Chapter 3 The Devil's Dictograph
(as of June 3, 2020 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Price:
How was this worn?