Nancy,
I'm so glad that you got the Pfaff. It really is beautiful.
The post sticking out to the right on the bobbinwinder is to hold a round stone. It is used to sharpen needles. Quite common on the old German machines.
The two "cups" on the frame are to hold oil can. Maybe one oil can and one kerosene can?
Nancy, I have two very different styles of 3/4 sized 15 Japanese clones. One is a solid cast metal body like a singer 15. The other has 2 light weight sheet metal removable covers (front and back) and a sheet metal bed which is also removable. Think clam shell. I'll try to remember to post picture when I get home on Friday. Anyone want to remind me (too many senior moments and a senior memory).
Cathy