Audio cassette player, Sony Walkman model TPS-L2, metal/ plastic/ electronic components, Sony design centre, Sony Corporation, Japan, 1979. The Walkman is a portable audio cassette player. The rectangular, blue and silver coloured case is manufactured from metal and plastic components. Controls are situated along the top and right side and the front flips open to reveal the tape playing mechanism. There is a small battery casing set in the back.