If your machine has the slides plates like the eBay listing, yours is a TS (transverse shuttle). All TSs take a 12x1 needle. AND most German TSs will work with the common industrial DBX1 needle.
Cathy, My machine looks like the e-bay listing, but in much better condition. I can get the left slide plate open, but the others are stuck. I oiled them, but think I might need to add a little force or some hair dryer heat to them to get them open. Is it necessary to have them open anyway?
Where can I get the industrial DBX1 needles? Thanks a lot for the information. Today I noticed that there is no stop on the casing. I think that my needle needs to be threaded from the left as that's where the last thread holder is on the needle clamp. Now after getting the needles, I need to figure out how to thread it. You have been a great help! This place is the best for asking for help and getting it!