Inverted Overprint Errors on Silver Certificates: Upside-Down Seals and Serial Numbers on 1935 and 1957 Series Notes
Inverted overprint errors on 1935 and 1957 Silver Certificates rank among the most visually dramatic mistakes ever to escape a Bureau of Engraving and Printing press room, with upside-down Treasury seals and serial numbers turning ordinary one-dollar notes into serious collectibles. This guide breaks down exactly how these errors occurred, which varieties command the highest premiums, and what every collector needs to know before buying or selling one.
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