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What' s the best Sony Walkman? Perhaps one of the following models. Check out this history of the once-popular consumer product.
A brief history of the Sony Walkman – Dan The Man Trivia
Obituary: Sony Walkman - Goldmine Magazine: Record Collector & Music Memorabilia
10 Portable Facts About the Walkman
The best portable cassette players ever made
Sony Group Portal - Product & Technology Milestones−Personal Audio
The Sony Walkman is returning as a hi-res streaming player
A history of Sony's successes and failures, Sony
Sony Group Portal - Product & Technology Milestones−Personal Audio
Personal stereo - Wikipedia
The history of the Walkman: 35 years of iconic music players - The Verge
Remembering the best and worst portable music devices
Walkman Turns 40 Today: How Listening to Music Changed Over the Years
Sony WM-EX190 Walkman Stereo Cassette Player with Anti-Rolling Mechanism : Electronics