This is The Elna Supermatic. For it’s time, it was an absolute revolution. It used cams to make fancy stitches. The folded up silver bit is the knee lever, instead of a foot pedal.
This was the Transforma. The short of cash woman would buy this straight stitch model, and then save her pennies. When she was ready, she took her machine in and they added the cam mechanism. At that point, it became a Supermatic.
These were the first vintage machines I bought. They have a friction drive mechanism that can go bad, and the repair is simple. Actually, I have repaired both of them. But, like an idiot, I forgot to use them in the last few years, and so the drive wheel has gone flat again. I’m taking it as a sign. I have (gasp) too many machines. These are for sale, along with another Supermatic, as a herd. I miss them already! So green, so cute! So Swiss made. I have to not think about it too much, or I’ll buy them from myself! ( I wonder if I would give myself a good deal?)