5c Brown, Double Transfer Ty. F, The "Wagshal Shift" (1-F). Clear double transfer of top frameline, upper part of side frameline, "U" and "Post Office", three large margins, cut in at bottom, cancelled by bold strike of red New York square grid cancel, tiny flaw in margin at top left, although cut in at bottom the essential elements of the triple transfer are intact at top, this is the discovery copy of the Double Transfer Type F, the "Wagshal Shift", only six are known to exist, unpriced in Scott

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