I have the one that is in the green and white case, got it at a garage sale for $25. Needless to say she didn't know what she had. I have my mom's black one that she got used in 1957. We made all our clothes on it till we got out of school. She left us in 2004 and I have it. Both of mine sew like a dream, and I have had the white one refurbished just this year, needed a new belt, it had sat up and it had just dry rotted. But all is well with them both now. The black one is the 221. I haven't looked to see what the one in the green and white case is or where it was made.
Sounds like you all know, so you can tell me. Thanks