Vintage Singer 15-91 parts.  Simanco #125377 Needle Bar.
With: Needle Stop Pin #32519, Needle Clamp #45285, Thumb Screw #51256C, and Gib and thread guard #125378.
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.