Singer 401

Singer did make a walking foot for the 401, which by the way is a terrific machine. The thing with walking feet is that their bottom mechanism needs to match well with the feed dogs on the machine you want to use it on. There's a Yahoo group called Vintage Singers made up of folks who collect old Singers, and they would probably be able to tell you which walking foot would work best on the 401. I had one several years ago, but my collection has moved back in time since then. My newest machines now are my Singer 319s, made in about 1956.

Pat in Rockport, TX