20c State Birds and Flowers, Se-Tenant Sheet of 50, Completely Imperforate (2002d). Lower right plate no. 11111 pane of fifty, bright colors and incredibly fresh, Mint N.H.

EXTREMELY FINE. BELIEVED TO BE ONE OF TWO KNOWN COMPLETELY IMPERFORATE PANES. ONE OF THE MOST IMPORTANT MODERN ERRORS IN UNITED STATES PHILATELY, NOT TO MENTION A KEY PIECE FOR A BIRDS OF THE WORLD COLLECTION AND ONE OF THE HIGHLIGHTS OF THE MARCEL V. AND DANIEL H. COLLECTION.

This incredible rarity is one of the pinnacle items for both modern error and topical bird collectors as it features each of the 50 State Birds of the United States. The rarity of this sheet should not be underestimated as there were originally only four recorded panes - one of which has blind perforations and another that was inexplicably cut up by an investment firm which leaves two completely imperforate sheets. This particular sheet has only been offered twice before at auction, first in a 1988 Jacques C. Schiff, Jr. auction and once again in a 1997 Shreves Collector's Series Sale. The other known sheet has only been offered once in the 1983 Rarities of the World Sale and has yet to re-surface in the marketplace since.

No other examples have been found since 1989, therefore it is highly unlikely others will surface at this late date. It should then be assumed that the catalogue value listed for this item has little significance to it's true potential value

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