Originally Posted by
itssewfun
I have a 1937 FW and it does not have a numbered disc on the thread tension dial so that on newer models that is a change. "Nettie" and I are going to a quilt retreat this week-end. She originally belonged to my DIL's grandmother Jeanette.
Yes, that was a change made to all Singer machines. There were other little outer changes made to FWs over the years, like different decals and moving the bobbin winder tension from the front of the machine to the top of the bed, and more. The FW web sites can give a lot more info about things like that.
Cari