I have 221 (3 of these), 66 treadle (2 of these), 127 treadle, 201 hand crank, 15-91 (my favorite, have 2), 301, and 503a. I had a 101, but passed it along when the motor gave out. I use them all but the 127 which needs major cleaning and repair. It was my hubby's great grandmother's machine which had been stored in a damp barn for years. The wood on the cabinet was not salvageable, but saved the drawers, irons, and machine. Can't wait to get it fixed up, but life keeps getting in the way!