11c Light Green, Perf 10 at Bottom (511a). Block of four, bottom pair Perf 10 at bottom, top stamps perf 11 all around, tiny h.r., bright shade

VERY FINE. AN EXCEEDINGLY RARE ORIGINAL-GUM BLOCK OF FOUR CONTAINING TWO EXAMPLES OF THE RARE 11-CENT PERF 10 AT TOP OR BOTTOM VARIETY.

With 1975 P.F. certificate. Unpriced as a multiple in Scott (which does give a price for a used multiple). Scott Retail as two singles

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