I'm glad I could help. I'm looking at them now. There is a "Pop Pedal Quiz" on another forum, but at first look through, I'm not seeing yours. I know I have seen a machine like yours, with very similar if not exact decals, but just don't remember which machine they were on LOL.
Funny on me. It sure looks like the machine with slightly different decals on the link to tumorfarmer blogspot. The shape, the stitch regulator and the shape of the plate under the spool pin. Let me see what I can find for a close manual.
Found one for an electric Eldredge B at
https://ismacs.net/national/national...n-manuals.html It will at least help with the threading.