Smith Eyeglasses Frame Transistor Matte Dark Ruthenium Blue V6D 52-19-140 O965 | eBay
Buy Transistor RX starting at USD 125.00 | Smith Optics
File:Vintage Beltone Tempo Transistor Eyeglass Style Hearing Aid (Hearing Glasses), Sales Model, Made In USA, Circa 1967 (15069206841).jpg - Wikimedia Commons