My Singer 221 was bought in 1966. There were only 4 coils. Although I've bought new machines, I've always gone back to my little featherweight portable, which I still rely on to this day. I bought 30 bobbins in a box 45785 and compared them to the original bobbins that came with my machine and they were identical. Unfortunately I haven't used them yet, but I plan to fill these spools with all the colors of thread so I can start sewing on any project. I am very happy to receive them. They came in a nice plastic sleeve that doesn't break easily. I'll write again to let you know if they don't work, but they appear to be correct.
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