File:Beltone hearing aids from the 1940s, 1950s, and 1960s rear view.jpg
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| Description |
English: Note that the dot system indicates the different parts inside, such as type of receiver.
Models shown include (left to right, top to bottom): "S" Symphonette 1948 vacuum tube (dot is yellow) "M" Melody 1950 vacuum tube (dot is black) "TR" transistor 1953 "L" Lyric 1952 vacuum tube (dot is green) "D" Dulcet transistor 1955 "F" Futura transistor 1963 (dot is white) |
| Date | |
| Source | Own work |
| Author | Karitxa |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:46, 29 December 2019 | | 1,600 × 1,288 (306 KB) | Karitxa (talk | contribs) | User created page with UploadWizard |
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