1909-S struck-through NGC MS64RB.
Struck-through errors occur when foreign objects fall between die and planchet during striking.
Pieces of cloth, metal fragments, wire, slivers of reeding, grease, oil, dirt, wire bristles (from wire brushes used to clean dies, resembling staples), die covers and other objects may fall between the dies and the coin. The most collectible struck-through errors are those with the foreign object still embedded in the surface
No Date/40% off center/struck-through on lower wreath/ANACS XF