Joe, many vintage Pfaff models can use those feet and they're pretty much interchangeable. It looks like the case matches the one I have for my 362, but they'd work on most of the Pfaff models. The darning foot can be hard to come by. I don't know why they have darning plates though as the feed dogs drop. I guess it's for those that don't want to do that and just snap on a plate??