WHAT IS THAT HOOK FOR in the lid? I must not put it on correctly because you hear it scrapping the machine when I put it on.[/quote]

That is to snap a small oil can into it. Ruth

Well maybe so, or I was thinking maybe the accessory box, that isn't in the bottom, the only thing in the bottom was 3 clear bobbines, and a small screw driver and brush. The clear bobbins had to be bought later, wouldn't you think back then the bobbins would have been metal. And you drop it in instead of a bobbin case.