MaggieLou

Can anyone tell me what this goes to? It's obviously a bobbin of some sort but I don't know what it goes to. It came in a box of cams but I'm sure it's too old to go in the machine the cams were for. The picture isn't the greatest but maybe it will give you the idea. It's about 3" long and 1/2" wide at the widest point and has a small hook on one end. The bobbin is in the center but it doesn't show up too well in the second picture.