Standard Class 15 15K Metal Bobbins
One of the most common bobbins used in older machines and most front loading / side loading bobbin machnes that use a metal class 15 bobbin
Never add thread to a partially wound bobbin. A bobbin filled this way is often uneven and may cause thread to tangle or break.
Do not use on drop in top loading bobbin machines
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Standard bobbins Classic metal
So far I’m pleased with bobbins as they for the winding mechanism of my old Riccar machine. I have yet to try them actually sewing but hope that they will fit and work properly. The only little problem I had was that they took over a week to arrive But if they they work it will be worth it and I shall order more.
