I'm gonna guess your two questionable attachments are the underbraider and the shirr plate. The problem with Singer's instructions, they don't actually show these two - because in the drawing showing them in use - they are UNDER the fabric. There are several styles of them though, so it will be fun to see which ones you have.
BTW - my 1907 attachment manual shows the style with the molded tray like what is attached to that drawer front.
This is the set that goes with it- but there are several variations. If you have this particular set, then it is likely that cabinet had the tray with the molded insert.
