Rolls Radio Transistogram

[Mike Watterson]

Supersonic was the big local African brand sold in South Africa. Originally battery valves and later transistors.
https://www.radiomuseum.org/dsp_herstell...ny_id=4378

I have one Supersonic battery valve set that was bought new in SA by a friend's mother.
This one, which works well. https://www.radiomuseum.org/r/mullard_d11.html