Originally Posted by
irishrose
It sounds like you have your answer. I bought repro bobbins from april1930s shoppe. They filled and sewed fine, but came unthreaded during FMQ. They were a tiny bit thicker than the one original I had. squeezed the edges in with pliers and now they are okay. My second 301 arrived with several original bobbins so I should pirate those for AnnieRose.
My 301s and FWs all share their bobbins equally and I just them all together so I can pirate/use them as I need them. I ddi buy some newer 301 bobbins at a sewing shop and they don't wind or work worth a hoot so I made them into Christmas tree ornaments for my kitties to take off the tree and play with. Noisy little suckers as they bounce down the stairs though.