5c Blue, Imperforate (315). Horizontal pair, large to huge margins, smudge cancels, Extremely Fine, with 2008 P.S.E. certificate stating genuine with "cancel of unknown origin", while cancels such as the ones on this pair are not ordinarily seen on stamps of this period, there were covers franked with many stamps and postal clerks often used this type of obliteration to save time (see lot 986), offered "as is", Scott Retail as with genuine postal cancellations

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