This Silver came into my possession when I was still at high school in the 60's. Used it for many years and just now did a full recap. Restuffed a 67.5 volt battery with 9 volt batteries to get the H.T.
The set works quite well for its age. There appears to be a slight audio distortion as have not been able to replace the old carbon resistors which have drifted in value throwing the bias off.
Cannot read the resistor values as the paint has flaked off and the only circuit diagram avaliable is of very poor quality and virtually unreadable.
If anyone has a good clear circuit I would be interested in a copy.

If you're referring to the schematic available on Radiomuseum, then I can appreciate your legibility problem.

The valve line-up 1R5, 1T4, 1S5, 3S4 was used in hundreds of battery portable brand models, so you might be able to find similar schematics.

Also, you may be able to figure out the resistor values by applying a derating factor to their present values.

Will look around for another similar valve lineup set. They were pretty common in the 1960's. A real needle nose plier and tweezers epic at times.

The AWA Personal Portable and the Astor Model KQ are two candidates with the same valve line up. Both are listed in Radiomuseum.
The Astor is clearer for component values and the AWA circuit has the valves upside down, as is your Silver, so "may" be easier to compare.
Good luck.
Harold

Realised I have a AWA 450-P with the same valve lineup and a good clear circuit diagram.

Thanks for the comments.

Photos uploaded.