Coats and Clark thread knot
I have been sewing with a spool of Coats and Clark thread. Not the first garment I have made with this spool, and half way through another and after winding two bobbins, I suddenly came upon two spots which were knotted. Not a snarl or anything like that. They were real tidy knots in which the tails were neatly cut off!! Stopped my machine right in its tracks. In over 50 years of sewing, I have never seen this!! Has anyone has this experience??