Actually, I was pretty sure this was the right model until I saw that list of machines on Allbrands. Then I started doubting myself, then doubting all the websites and their claims. Even Google search wouldn't cooperate, kept pulling up the Towa TM-3 or the TM-1 when I specifically searched for the TM-2. I don't think there is such a thing as a Bernina Bernettte 430 or 440 either.
You know, I also have a Bernina 830 with the unique bobbin, the big black one with the silver spots. No way would one of those fit into a tension gauge.
Sigh! I'm going to bed.