My unique little mantle radio!

I have the same issue with that schematic - It's just to damned big to read.

That said I wonder if that connector might not be for an extension speaker. Given the age of the radio I expect that it would have an electromagnet on the speaker and the extension speaker ( If indeed that is what it is for ) would also require pinouts for the field coil and the voice coil.

Pretty little radio - It almost looks to be grinning