Originally Posted by
joycet
Featherweights and 301's both use class 15 bobbins. they do not use class 66. those are for models 66, 99 and 201.
NO THEY DON'T. Class 15 bobbins are as thick or thicker than the Class 66 bobbins. No way would they fit.
Singers that use the 221/301 bobbins: late 9W-7, 221, 222, 301. The Class 66 and 15 will not fit.
Joe ..... who will do a comparison pic of these bobbins in a while.