It's The 35th Anniversary Of The Sony Walkman

The first of Sony's iconic portable cassette tape players went on sale on this week, July 1st, back in 1979 for $150.

A story at theverge.com reports Sony co-founder Masaru Ibuka got the wheels turning months before when he asked for a way to listen to opera that was more portable than Sony's existing TC-D5 cassette players. The charge fell to Sony designer Norio Ohga, who built a prototype out of Sony's Pressman cassette recorder in time for Ibuka's next flight.

After a disappointing first month of sales, the Walkman went on to become one of Sony's most successful brands of all time, transitioning formats over the years into CD, Mini-Disc, MP3 and finally, streaming music. Over 400 million Walkman portable music players have been sold, 200 million of them cassette players. Sony retired the classic cassette tape Walkman line in 2010.