Bobbin Singer 221 301 Metal
Outside diameter: 21.9mm Height: 7.4mm Axis diamter 6mm 8 holes around rim.
Singer/Bernina Rotary Metal Sewing Machine Bobbins - ALPHASEW 221 Featherweight - BERNINA 217, 540 - NEW HOME NLB - SINGER 221 Featherweight, 221-1, 222, 301 - Outside diameter: 21.9mm - Height: 7.4mm - Axis diamter 6mm Alternate Part Numbers: A1225