: Because of this specific left-pointing finger, it is not compatible with standard Class 15 machines or clones, where the finger typically points to the 1 o'clock position.
The number most commonly refers to a specific, specialized bobbin case (part number #125291) used in vintage Singer sewing machines . Key Technical Specifications
: This bobbin case features a "backward-latch" with a finger that points to the 11 o'clock position (left-pointing).
: 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
This part is specifically designed to fit several classic Singer models, including:
: 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 .
: Models 15-75, 15-88, 15-89, 15-90, 15-91, and 15-125.
