What are these? questions
I found a Singer box with some accessories at the local thrift for 2.00 and bought it mostly for the box and the Singer walking foot. It's always nice to have a box for the accessories for each machine and I've recently fixed up some slant needle machines so I am happy to get a walking foot for them.
I don't know what machine the plates fit and the one has a raised center so no idea what that's about. I have a couple of those little round white plastic things..what is that? There's some snap on feet but no part to snap to, an interesting buttonhole attachment. I'm not sure if it's all there but it has a spring loaded part and kinda looks like you would put a button in the back and it would make the hole the right size?
I'm especially curious about the two parts in the lower right of the photo. One is a clear plastic hopping foot with a curved spring back and the other is hinged with a spring but I have no idea what it is.