Vintage Singer 15-91 parts.  Simanco #125061 Presser Bar.
With: Presser Bar Spring #8399, Pressure Regulating Thumb Screw #51228J (4th scan), Presser Bar Lifter Hinge Stud #15486 and Set Screw #453C (5th scan).
All used working parts. From Singer 15-91 but fits most 15 machines. Return for refund if fails to work on your 15 machine.
Price includes shipping.