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The First Walk Man, a Quarter Billion Walk Mans
The first walk man comes out in japan in 19 79. It sells through the 30 thousand initial production run in one month. The next month it doubles, and then the next month it triples. Jake saper on the l p show said he looked for triple, triple, double, double in the first four years of a start. I mean, that's both incredible but i don't think there were any other single products that sold quarter billion units.