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| Cover of the “Actual Size” promotional brochure for the Microtone “Classic” hearing aid, 1949. The aid (and brochure) were 2-1/4 x 3 inches. The “Classic” came in a sterling silver case. |
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| Cover of the “Actual Size” promotional brochure for the Microtone “Classic” hearing aid, 1949. The aid (and brochure) were 2-1/4 x 3 inches. The “Classic” came in a sterling silver case. |