Rain,
Thanks. I thought ( erroneously I guess ) that the 206s were cast iron. I guess cos they are black and look like the old style black Singers.
So it seams that when Singer introduced the ZZ machines they pretty much switched to aluminum too. Very interesting.
Mom3,
I don't have anything in the 200 series. Our Singer ZZ's start with 3xx. I'll have to keep my eyes open for one.
Joe