Walkman
Development
The metal-cased blue-and-silver Walkman TPS-L2, the world's first low-cost portable stereo, went on sale in Japan on July 1, 1979, and was sold for around ¥33,000 (or $150.00), or ¥57,109.02 (or $498.66) adjusted for inflation. Though Sony predicted it would sell about 5,000 units a month, it sold more than 50,000 in the first two months. Sony introduced the Walkman in the US as the Soundabout and the UK as the Stowaway; as developing new, trademark-free names in every country was expensive, Sony settled on Walkman, a play on Pressman. The TPS-L2 was introduced in the U.S. in June 1980.
Walkman-5