My old kenmore had a box of two layers of cams. The crank shaft of that sewing machine broke in 2 pieces and I tossed the machine. They are reddish brown in color and loaded on the top of the machine. Somewhere in this house I still have that box of cams. I hardly discard anything sewing related unless it is really dead. Now I will have to look for them most likely moved to a box on top of a cupboard where other olders part get delegated to. Will have to look. They are from the late 1960's.