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ISMACS International
International Sewing Machine Collectors' Society

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Singer Bobbin Information

Bobbin Type

Models
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 Long Bobbins 27
28
127
128
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 Class 66

Bobbin sides are slightly domed.

 66327431
98328478
99337500
185401503
201    403     534
285404     714
317411
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 Class 15

Bobbin sides are completely flat.

 15
30TC
25TC
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 Class 221/301

Part Number: 45785.

FW bobbins are flat sided but are thinner than the Class 15 Singer bobbin.

 221
222
301

Sears Kenmore Model 49
Free Westinghouse (certain models)

These last two machines have what is titled the "rotary" bobbin case by Sincere's Sewing Machine Service Book, page 7. These are not the "rotary" bobbins that White's Rotary Machines take.

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