Courtesy of Zenith Electronics Corporation |
Cover of the “Actual Size” promotional brochure for the Zenith Royal hearing aid, 1951. The brochure (and hearing aid) measured 2-5/16 x 3 inches. |
Courtesy of Zenith Electronics Corporation |
Cover of the “Actual Size” promotional brochure for the Zenith Royal hearing aid, 1951. The brochure (and hearing aid) measured 2-5/16 x 3 inches. |