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SIN-52237NBL (G) | Bobbin Case with NBL Spring for many Single needle Lock stitch machines.

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SIN-NBL-1303 | 417269 | MF01A0245 | NBL / brake spring for "M" Bobbin Case

SIN-52237 | Bobbin Case for plain machine

SIN-173058 | Singer Bobbin Case 306K 319K