I think the first Singer model with a potted motor was the 101. I guess worm gears add a bit to the mechanical, so they are not all direct drive. The belt driven models are good too, I have a belt driven 201. That said, the potted motor is very neat and low noise. The closest you get to these with more features, swing arm zigzag, stitch patterns, etc., are probably a 401 and related models. They have the motor placed verticlaly in the body, driving the mechanism with gears, all metal, and there's no belts.
Last edited by Mickey2; 12-07-2020 at 02:11 PM.