aaand I totally meant to reply to the original post. This is what I get for checking dreamwidth before my morning tea!

I have a lovely old treadle machine (that is unfortunately stuck at my parents' house until I can magic up some space in my sewing room) with all the weird attachments. I am incredibly grateful that not only did it come with the original manual, but that some thoughtful soul xeroxed it before the old paper fell apart completely. Now I know what the presser feet are, even if I don't know how to make them work.