The number most commonly refers to a specific, specialized bobbin case (part number #125291) used in vintage Singer sewing machines . Key Technical Specifications

This part is specifically designed to fit several classic Singer models, including:

: Collectors and restorers often look for original Simanco (Singer Manufacturing Company) stamped versions on sites like Old Singer Shop or Vintage Singer Parts .

: It helps prevent the bobbin thread from tangling or unraveling when sewing operations start and stop by ensuring the bobbin stops spinning quickly. Compatible Singer Models

You can find these parts from various retailers and specialized vintage sewing suppliers:

: 117 Plume, 15K88, 177, 177C, 191J, 191K, and 293B. Availability and Purchasing

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125291