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Singer 99
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10-10-2012, 09:29 AM
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J Miller
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Join Date: Feb 2012
Posts: 8,091
That piece of felt is a lubrication wick for the bobbin carrier to hook contact area. The 66s and 99s had them. You were correct to leave it in. Put a couple drops of oil on it when ever you oil the machine.
Joe
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