1988 WM-505
The WM-505 is a playback-only Walkman equipped with an automatic inversion function.
If you find it useful, you can support it. Support the archive
The WM-550C is a playback-only Walkman with an automatic inversion function. It features Dolby B and is compatible with AA batteries and gum-type rechargeable batteries. It is an early high-performance model that combines automatic inversion and noise reduction functions.