Back-of-Book Extensions Balance. Offered as individual lots in sales past, unused including Nos. C1 plate block of six, lightly hinged, J18 and O8 both with disturbed original gum, O34 with star in circle cancel (rebacked, reperfed), O86 original gum block of four with part imprint, O115 block of four, PR23 used (faintly toned at bottom), JQ3 plate block (lightly hinged, few expertly rejoined perf separations), Fine-Very Fine or appear so

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