File:Beltone hearing aids from the 1940s, 1950s, and 1960s front view.jpg

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English: Models shown include (left to right, top to bottom):

"S" Symphonette 1948 vacuum tube "M" Melody 1950 vacuum tube "TR" transistor 1953 "L" Lyric 1952 vacuum tube "D" Dulcet transistor 1955

"F" Futura transistor 1963
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Author Karitxa

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current19:46, 29 December 2019Thumbnail for version as of 19:46, 29 December 20191,600 × 1,398 (303 KB)Karitxa (talk | contribs)User created page with UploadWizard

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