Vintage Singer 221 / 222K Featherweight sewing machine rotary hook assembly, set screws included. This one features the later style base which was recast in the mid 50s (usually found on machines with the Prism decals and the 222K) but is compatible with earlier models as well. Very nice vintage condition with minor signs of age, clean and rust free. Turns freely. Genuine, original Simanco part #45924.