I found this sewing machine. It runs like a charm, I was having a garage sale, and I went back into my mother-in-law's shed to get (just a few last things), and I said you know I have seen that box over there for years, I wonder what it is, and Lookie what I discovered a Singer ? I looked it up with the serial # EK----- and it was made in Scotland in 1955 I think. and I put oil to it and away it went. My question is the second pic. 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.
Singer EK series
What is this for?