Category:Measuring instruments (hearing)
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Media in category "Measuring instruments (hearing)"
The following 11 files are in this category, out of 11 total.
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Vintage Hearing Aid Paper Weight Featuring Zenith Transistor Aids (15490915800).jpg 2,989 × 2,383; 2.56 MB
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Vintage Sonotone Hearing Aid Battery Tester, Model AB-2 (14248576417).jpg 3,843 × 2,933; 3.02 MB
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Vintage Sterling No. 31A Hearing Aid Tester Voltmeter (14242571121).jpg 4,317 × 2,960; 5.3 MB
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Vintage Sterling No. 44 Pocket Voltammeter, Made In USA (22306910276).jpg 3,723 × 2,422; 4.1 MB