Time to get this site upgraded, so we are passing the hat around. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html
We appreciate your help
in keeping this site going.
Looks like a portable battery/AC radio circuit board. I've seen lots of these, the manufacturers must have had tons of boards meant for portables to use up.
I see the set uses Fairchild transistors. I picked up an el-cheapo Am only portable with ten of those transistors. I looks like they used them for diodes, as well.
I see, they switched the center tap of the power transformer. At least, it uses full wave rectification.