SAINT HELENA 1999 (MNH) 15P QUEEN MOTHER SHEET, UNISSUED FORMAT
15p Queen Mother's Century plate 1A–1A–1A–1A sheet of 50 stamps in unofficial format from an unannounced limited promotional printing. All sheets were believed to have been split to fulfill a promotional campaign, but a handful have survived intact. Extremely scarce. Folded horizontally along perfs otherwise fresh and fine. Mint never hinged. SG790; SC740
Note: the officially issued stamps exist in sheets comprising two panes of 25 stamps separated by a gutter with plates 1A x 4 in the top margin and plates 1B x 4 in the bottom margin
