As far as the generic or vintage foot. I know it's not a vintage foot since it looks just like the one for my modern Janome. It doesn't look anything like the penguin or any of the older attachments I've seen. I've quilted 3 others on the same system with no problems. I kept the box the foot came in. It doesn't say much. It's a plain white box that says Walking Foot in English, French and Spanish. Then there is a picture of it and it says "contents, 1 piece". Does this help?
OH....thread to my little runners.... How would you straight line quilt a Log Cabin?
So you can see them.