The ANSWER.. Will a Pfaff 1222 pedal operate a Pfaff 1222E? This is what happened in my case. We managed to track down the 053 pedal for use ONLY with the 1222E
Pfaff Sewing Machine Foot Control for 1222 Series | Pfaff Bobbins & Other Accessories
Amazon.com: Foot Control Pedal #90-222040-08 For Pfaff 1212, 1221, 1222E Sewing Machines