Freak

A freak is an extreme variant that occurs during stamp production. It is not as extreme as what is considered a true error. Freaks are usually one-off flaws, not reproduced or reproducible exactly.

If extremely minor, they would be considered just bad printing. For example, if perfs cut the design slightly, this could even be normal in earlier stamps where technology did not allow perfectly centered stamps. However if perfs are shifted significantly, however that is interpreted, the stamp is a freak.  File:US preprint foldover.jpg|Pre-printing paper foldover. See: Foldover. File:US 12c torch guttersnipe.jpg|A guttersnipe. See: Guttersnipe. File:US perf shift.jpg|Perf shift. See: Perf shift. File:GB ductor blade xmas.jpg|Great Britain heavy ductor blade flaw. See Ductor blade flaw. 

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