Unfortunately , I have not been able to examine my machine yet. It was bought out of state and stays at a friend's house. I will get to see it this July. This machine is a Domestic #3. I believe it is dated from the stamping on the cabinet. It originated in England and was brought here after WW2 I believe. I will start looking for Boye needles. The picture in the instruction manual shows a notch at the top of the needle. I see slits in the shuttle and 2 hole looking openings on a moving part that is attached via a spring or screw at it's base. (looking at a picture)