I know absolutely nothing about this machine, except that it seems to be the one that Singer decided to put the true Pfaff IDT onto, which Singer calls "IEF". It's cute, it's called a "featherweight" and is used to retail for $600 or so, now $330 plus a $10 off coupon. I'm almost intrigued enough to consider getting one, being a Pfafffie for 30 years. People have said that it's the same as the Pfaff Passport.
No affil, of course, with Amazon, although I do wish I had some stock ;-).
https://www.amazon.com/gp/product/B0...KIKX0DER&psc=1