I've recently acquired a Singer 201. I thought I'd read that it took the same bobbins as the Featherweight, but even if they can be used for sewing, my (modern) FW ones won't go on the 201's bobbin winder spindle. The 201 bobbins have a little hole right up against the centre of the bobbin, that fits onto the spindle, and the FW ones don't have this in the same place. (hope you can understand that explanation!)
Does anyone know where I can get 201 bobbins?