In 1991, the Bureau of Engraving and Printing installed an experimental press that printed both sides of $1 bills from a continuous roll of paper in a single pass.

Known as “web notes,” these bills have two identifying clues: no plate-position number on the front, and a back plate number located near the top of the “E” in “ONE.” The press was discontinued in 1995 after it struggled to sustain long production runs.

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