This was my Mother-in-laws machine from the 1960's. It weighs a ton , but it sure stitches through anything. The issue with it is it is a left position for the needle. Not center like the new machines. I've marked a mark on the throat plate to know where the perfect 1/4 inch seam is.
It uses a Class 15 bobbin and the needle threads from the left to the right. I hadn't heard of them before but they made them for several years. My husband had to re-wire the light, motor and the foot pedal. It had been in a cabinet and the foot controller didn't have a back on the bottom of it. It is electrically sound now and is a quiet running working machine. I have it set up on a table I can do piecing with it.
Sun is out and almost 50 degrees today. Melting going on. Chris