1c Ultramarine (63a).
Original gum, lightly hinged, radiant color in this distinctive shade, Very Fine, in his 1c book, Don Evans devotes almost an entire column on p. 33 to a discussion of the Ultramarine shade, he notes that it is "extremely scarce" and that apart from the Ultramarine and Indigo shades, "the remaining shades are comparatively plentiful.", with 2011 P.S.E. certificate
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