Hi - ERC stood for "Electra Radio Corporation". We had 3 of these 1405 receivers in the house at one point. They were decent, modest-power receivers with good sound and a "quadrasonic" feature as well as magnetic and ceramic turntable inputs. We bought each of them from "Tech Hi Fi" back in 1978 as part of a bundle with a pair of Studio Design bookshelf speakers and a BSR McDonald turntable. This was the perfect package for a dorm room. Some had a silver face, others had a smoked glass face, but both had green backlighting. I've replaced the drivers in my speakers a couple of times over the years, but the receiver is still running (a friend has it now.) On the back it is stamped "ERC Bayonne, NJ" but I believe it was manufactured in Japan (not sure). It's a good, solid unit that has been running for for 38 years with absolutely no problems. Hope that info is useful to someone - I know this is an old thread.