: Suppliers such as GoldStar Tool offer quantity discounts for bulk purchases.

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

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

: Models 15-75, 15-88, 15-89, 15-90, 15-91, and 15-125.

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