Info. on EKCO SRG603, please
 

In particular, from when does it date. I haven't seen this set, but assume it's valved. The 603 isn't included in the service data from VRSD.

Re: Info. on EKCO SRG603, please
 

According to the information from R&T Servicing 1972 to 1973 the Ekco SRG603 is electrically similar to the PYE model 1214 and is solid state not valves.
It must date at around late 60's to early 70's.

Hope that helps

Dave

Re: Info. on EKCO SRG603, please
 

Thanks, Dave.