The blue-and-silver Walkman TPS-L2 (the first commercially available Walkman) went on sale in Japan on July 1, 1979.
This magazine ad comes from June 1980 (in the UK the Walkman was known as The Stowaway).It was not cheap (around £100, with a second set of headphones costing around £15 extra- the average weekly wage in the UK in 1980 was £110)
