Transistor Radios, Crystal Radios: Pix and Info on Collectible Radios
The Original Sony Walkman

Pictured in the middle below is the TPS-L2, the very first Walkman. So early is this example that it is not even labeled “Walkman,” as is the slightly later model TPS-L2 you see to the right. At left is the pre-Walkman TCM-600 introduced in 1978 as the world's smallest tape recorder for standard cassettes. For more on the Sony Walkman and other pioneering personal music players, go here.

Or see all the collections here:
 Vintage! The Collections of Eric Wrobbel
The Original Sony Walkman