Walkman: A História Ilustrada (1979–2004) A timeline of Sony’s cassette Walkman models from 1979 to 2004 - EP.8 - 1983: SONY WALKMAN WM-10

 

Introduced in 1983, the WM-10 shrank the Walkman to cassette-case size. That scale came

 from aggressive miniaturization, including a flat disc motor and a bearing integrated into the

 supply spool. Despite its size, it offered Dolby B, supported normal, chrome, and metal tapes,

 and included auto-stop. The tradeoff was durability, an issue Sony later addressed in follow-up

 designs.