WM-50

The WM-50 was a basic stereo cassette Walkman that marked one of Sony's first clear moves away from strict miniaturization toward a more comfortable everyday form. It used rounded edges and softer plastic surfaces instead of the sharper, boxier shells of earlier models, while keeping a simple single-AA battery layout and straightforward belt-drive transport that could be used either upright or flat. Playback supported normal, chrome, and metal tapes, but the design kept the player light, simple, and inexpensive.

This was not about impressing through specifications or shrinkage. By 1985 Sony had already shown it could make Walkmans tiny, so this model shifted attention to how the player actually felt in a hand or bag over the course of an ordinary day. It came from the part of the lineup less concerned with technical ambition than with making the format familiar and easy to handle.