The TR-65 was a huge hit not only because it was smaller but also because it consumed half the power of existing radios. The price of 13,800 yen, the same as the average monthly wage at the time, did not stop sales. The TR-65 was behind the evolution towards one radio per person from a radio per household.
By the way, there is another TR-63 anecdote: it marked the first full-scale export of transistor radios from Japan. The price was US$39.99 and it was such a huge hit in the US, a Japan Airlines flight had to be chartered to meet demand. The true moment that Sony flew out to the world.
The next year, Tokyo Tsushin Kogyo changed its name to Sony. And soon, the catchphrase "the global brand made in Japan" would be commonly used.