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One of the most flagrant flaws of this nature—in fact,probably the outstanding error of philatelic history—isthe so-called "five-cent error" that occurred in sheets oftwo-cent stamps printed in 1917. As we have noted inour description of the making of line-engraved steelplates, proofs are usually taken before the plate is putinto production and any errors or flaws noted thereon are marked and the plate is then corrected. In 1917 onone plate of two-cent stamps—of four hundred subjectsof course—it was noted that three impressions on theplate were not satisfactory. These three designs were
"Five-cent error" in asheet of two-cent stamps. |
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