Thanks Miriam!
I'm hopefully going to go and take a look at in person soon. I've joined the vintage Japanese badged machine Yahoo group (though don't seem to be approved yet) and have been through all the Deluxe Zig Zag manuals on sewusa. I also emailed Zorba because he has what looks to me to be the same machine. I'm hoping the cord isn't too badly damaged and that I can get a reasonable price...