Peter Heembrock
Forum Participant

Hi John,

Thanks for pointing me to the Riders Vol 1…I have had a quick look in there and no luck…the key differences in the model I have are:
it has a phono input ( 2 pin plug on top of chassis at rear )
tubes are in a straight line
speaker plug is 4 pins…ll of the SM radios I have looked at have 5 pins for the speaker socket.
The escutcheon has the name Duchess embossed on it…

It does appear to be a variant of the SM-60B with an additional RF amplifier stage added at the front end…
I think I can move forward with this and the biggest issue is that this is a Canadian variant…made in Toronto…