1974 (J-Kansas City) $10 FRN CU (Fr#2022-J) Offset

SN#J90938567A. This is a very dark, 80% Front-to-Back Offset Error.

During production, currency paper is fed between an Impression Cylinder and an Engraved Steel Printing Plate - to which the prior forces the paper into inked cuts of the latter. An Offset Error occurs when the inked Printing Plate comes into contact with the Impression Cylinder without a sheet of paper. The ink is transferred and if paper is fed through while the transferred ink is still wet, Offset Errors occur - continuing to a lessening degree as the ink is used up and dries.