I recently got one of these. Singer 128-23 to be exact. Evidently the 23 relates the wrinkle finish. She is 3/4 size machine, but full in weight!! You will not be taking her to a workshop unless you have been lifting weights recently. Mine has horrible looking wires, and I'm making mine into a hand crank.
Only you can decide if the machine is worth your time and trouble. Good Luck.