You can find these parts from various retailers and specialized vintage sewing suppliers:
The number most commonly refers to a specific, specialized bobbin case (part number #125291) used in vintage Singer sewing machines . Key Technical Specifications 125291
: Models 15-75, 15-88, 15-89, 15-90, 15-91, and 15-125. You can find these parts from various retailers
: Modern high-quality replacements are available from brands like ZIGZAGSTORM and CKPSMS on platforms like Amazon and eBay . 125291
This part is specifically designed to fit several classic Singer models, including: