I have searched online to find the first transistor radio that I owned, and do believe I've finally found it, pictured above. I appreciate radiomuseum.com for giving me permission to use the photos. I received my radio in the 1960's. It was the aqua blue color you see in the picture, solid plastic front and back. To open it up to put in the 9 volt battery and see the workings inside, you took a coin and "twisted" the front and back apart from the bottom edge of the radio using a notch designed just for that purpose. It had dials on each side, one for volume, one to change the stations. You viewed the stations through a little hole. I am sure my first was just an AM radio.
I can still remember opening the box, it fit snugly in the cardboard box. I'm sure I had the old style earphone, the white one that was on a long thin wire and went into one ear, but I think it broke early on, because I remember listening to my radio under my pillow with my head resting on the pillow in just the right spot when it was supposed to be off and we were supposed to be sleeping.
Dad was so delighted to be able to give my brother and I these radios, he was into electronics, and at that time, a transistor radio was a big deal for kids like us.