T K Evans,
Nice machine - looks like a lot of Kenmore machines -
Here is a link to a generic zz manual
http://www.dontai.com/wp/images/imperial-535-manual.pdf
I don't know if it will help with the decorative stitches though. I see a plastic cam stack so it is from the 80's
I'm thinking I like the drop in cams/disks better than the cam stack machines.
Much easier to work on and they seem to keep on going.