The Sony WM-10 is a vintage gem released between 1981 and 1983. Sony really pushed miniaturization to its limits with this one. The Walkman is smaller than a cassette when closed, and extends to accommodate the tape when you use it. Inside, everything is incredibly compact: flat motor, miniaturized electronics, and a converter to run everything on a single AA battery. And despite its tiny size, it plays metal and chrome tapes with Dolby B. It's a beautiful piece of engineering, a very distinctiv