In the later years of the Ericofon two new colors were introduced. Brown and "Harvest Gold". I put that in quotes because that's the name I gave it. but, back in the late 70's this color was very popular and was always referred to as Harvest Gold. I don't know about you, but I certainly don't miss the "Earth tone years".
I think North Electric had these made, but it could also have been CEAC, but I doubt it. CEAC mostly tried to peddle what they could of the Ericofon line, I don't think they were keen on expanding it.