I would still love to have a Featherweight, but got in my storage building and dug out a Necchi portable that my SIL picked up off the curb and, lo and behold, when I tried it out it works beautifully. I don't think it has ever been used! and has been in the case for years.
It has zig-zag and you can drop the feeddogs.
Now I am wondering how old it is. I know it was given to me about 10 years ago.
The only thing it says on the box and on the book is Model 535FA SN225726.
I don't have camera to post a pics. Sorry.
Thanks for your help in satisfying my curiousity.