File:Vintage Sonotone Model 1010 Hybrid (2 Vacuum Tubes & 1 Transistor) Hearing Aid. The First Commercial Product In The World To Use Transistors, Made In USA, Introduced December 29, 1952 (26251999474).jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 21:06, 28 May 2018 | 2,492 × 2,146 (2.41 MB) | imagescommonswiki>Ser Amantio di Nicolao | Transferred from Flickr via #flickr2commons |
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