Yeah, as everyone said we had the JMP cosmetics until 1983 up here in Scandinavia, both for the non-masters and masters. They also have two boards, one just for a bunch of extra fuses, but is as far as I know the same circuit as their JCM cousins of a given year. As for the 2203 and 2204 specifically, I don´t think they turned up in JCM800 clothing around here until the vertical inputs in 1984 or 1985.