I did a little more image searching and think I nailed it: A Necchi 545
It did come with a manual, but it has no company information and even calls it a "Alice Super Zig Zag 2" on the cover, reminiscent of manuals that are hastily put together for import items.
It runs pretty good. I had to take the camstack apart because it was gummed up and wouldn't move. but otherwise feels like a nice machine.