When I was a kid in the 60s "Transistor" and "Solid State" were prominent marketing terms.
Dude .,. that was still going strong in the 70's through the 80's with the rise of computer chips
My first one looked a lot like that but the leather case covered over the top too. Still had it until the house fire in 2012. Best I recall I received it as a Christmas present around 1965-66.for me it was...